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Journal articles on the topic 'Methyl Hydroxy'

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Published: 5 June 2025

Last updated: 1 August 2025

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1

JAWAHAR, SINHA, PRASAD SINGH RAMAYAN, and N. SRIVASTAVA JAGDISH. "A New Synthesis of some naturally occuring lsocoumarins. 8-Hydroxy-3-methyl-3,4-dihydroisocoumarin (Mellein) and 8-Hydroxy-3-methylisocoumarin." Journal of Indian Chemical Society Vol. 63, Oct 1986 (1986): 907–9. https://doi.org/10.5281/zenodo.6302309.

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Department of Chemistry, Bhagalpur University, Bhagalpnr-812 007 Manuscript <em>received 20 January 2986, accepted </em>2 <em>August 2986</em> 3-Methyl-8-methozyisochroman (5a) on oxidation furnishes 3-methyl-8-methoxy3,4-dihydroisoconmarin (6a), and demethylated with hydriodic acid to 3-methy1-8- hydroxy-3,4-dihydroisoconmarin (mellein) (7a). Treatment of 6a with <em>N</em>-bromosuccinimide followed by raining with triethylamine furnishes 3-methyl-8-methoxyisocoumarin (8a) which on demethylation with hydriodic acid yields 3-methyl-8-hydroxyisocoumarin (9a). Sa and 3-methyl

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2

Legrand, Sacha, Göran Nordlander, Henrik Nordenhem, Anna-Karin Borg-Karlsonc, and C. Rikard Uneliusa. "Hydroxy-Methoxybenzoic Methyl Esters: Synthesis and Antifeedant Activity on the Pine Weevil, Hylobius abietis." Zeitschrift für Naturforschung B 59, no. 7 (2004): 829–35. http://dx.doi.org/10.1515/znb-2004-0714.

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The pine weevil Hylobius abietis (L.) (Coleoptera: Curculionidae) feeds on the bark of coniferous seedlings and is the economically most important forestry restocking pest in large parts of Europe. Substances with an antifeedant effect may offer an environmentally friendly alternative to insecticides for the protection of planted seedlings. Bioassays were performed on commercial and synthetic methyl hydroxy-methoxybenzoates in order to determine their possible antifeedant activity.Two methyl hydroxy-methoxybenzoates were synthesized by esterification and mono-O-methylation of two dihydroxybenz

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3

Mohammed, Mohammed Hassan, Monther Faisal Mahdi, and Fadhil Mohsin Hamed. "Synthesis of 2, 3-Dihydro-1,4-naphthaquinone Derivatives for Targeting the Altered Cancer Cells Metabolism." JOURNAL OF ADVANCES IN CHEMISTRY 12, no. 7 (2013): 472–81. http://dx.doi.org/10.24297/jac.v12i7.2804.

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A new four derivatives of 2,3-Dihydro-1,4-naphthaquinonewere synthesizedas possible bioreductiveprodrugs for5-fluorouracil (5-Fu),Mercaptopurine (6-MP), N-acetyl cysteine (NAC)and 3-bromopyrovic acid (3-BPA) to selectively deliver the drugs into the cancer cells and these are:2-((5-fluoro-1,2-dihydropyrimidin-4-yloxy)methyl)-3-hydroxy naphthalene-1,4dione(compound A),2-((9H-purin-6-ylthio)-3-hydroxyl naphthalene-1,4dione(compound B)acetmido-3-((3-methyl-1,4-dihydronaphthalen-2-yl)methylthio)propanoicacid (compound C)and hydroxy-1,4-dioxo-1,4-dihydronaphthalen-2-yl)methyl3-bromo-2-oxopropanoate

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4

Mohammed, Mohammed Hassan, Monther Faisal Mahdi, and Fadhil Mohsin Hamed. "Synthesis of 2, 3-Dihydro-1,4-naphthaquinone Derivatives for Targeting the Altered Cancer Cells Metabolism." JOURNAL OF ADVANCES IN CHEMISTRY 4, no. 2 (2008): 472–81. http://dx.doi.org/10.24297/jac.v4i2.2708.

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A new four derivatives of 2,3-Dihydro-1,4-naphthaquinonewere synthesizedas possible bioreductiveprodrugs for5-fluorouracil (5-Fu),Mercaptopurine (6-MP), N-acetyl cysteine (NAC)and 3-bromopyrovic acid (3-BPA) to selectively deliver the drugs into the cancer cells and these are:2-((5-fluoro-1,2-dihydropyrimidin-4-yloxy)methyl)-3-hydroxy naphthalene-1,4dione(compound A),2-((9H-purin-6-ylthio)-3-hydroxyl naphthalene-1,4dione(compound B)acetmido-3-((3-methyl-1,4-dihydronaphthalen-2-yl)methylthio)propanoicacid (compound C)and hydroxy-1,4-dioxo-1,4-dihydronaphthalen-2-yl)methyl3-bromo-2-oxopropanoate

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5

Baron, ML, LL Martin, ID Rae, PM Simmonds, and ML Woolcock. "Relaxation Processes in Aromatic Methyl Groups. II. Methyl-Methyl Nuclear Overhauser Enhancements." Australian Journal of Chemistry 43, no. 4 (1990): 741. http://dx.doi.org/10.1071/ch9900741.

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A range of compounds with methyl groups disposed ortho and peri on heteroaromatic frameworks have been prepared, and T1 values and methyl-methyl Overhauser effects measured for them. Most of the n.O.e . Values were ≤6%, but two examples of methyls flanked by two others exhibited values of 9% (6-hydroxy-4,4,5,7-tetramethyl-3,4-dihydro-2H-benzopyran-2-one) and 15% (1,4,5,8,9-pentamethylcarbazole).

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6

Wiedenfeld, Helmut, Agnieszka Pietrosiuk, Miroslava Furmanowa, and Erhard Roeder. "Pyrrolizidine Alkaloids from Lithospermum canescens Lehm." Zeitschrift für Naturforschung C 58, no. 3-4 (2003): 173–76. http://dx.doi.org/10.1515/znc-2003-3-405.

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Seven pyrrolizidine alkaloids (PAs) have been isolated from Lithospermum canescens and their structures determined by spectroscopical methods. Besides the known lycopsamine, O7- acetyl-lycopsamine and O7-acetylintermedine four new PAs were found. Their structures are O7-(3-hydroxy-3-methyl-butanoyl)-O9-(+)-trachelanthoyl-heliotridine (= O7-(3-hydroxy-3- methyl-butanoyl)-rinderine = canescine), O7-(3-hydroxy-3-methyl-butanoyl)-O9-(D)-viridifloryl- heliotridine (= O7-(3-hydroxy-3-methyl-butanoyl)-echinatine = canescenine) and their O13-acetyl-derivatives (= acetylcanescine; acetylcanescenine).

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7

Krečmerová, Marcela, Antonín Holý, and Milena Masojídková. "Pyrimidine Acyclic Nucleotide Analogues with Aromatic Substituents in C-5 Position." Collection of Czechoslovak Chemical Communications 72, no. 7 (2007): 927–51. http://dx.doi.org/10.1135/cccc20070927.

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NH2-protected 5-phenylcytosine and its derivatives 2a-2d were treated with (2S)-2-[(trityloxy)methyl]oxirane (3) followed by etherification with diisopropyl [(tosyloxy)methyl]phosphonate (5) in the presence of sodium hydride. The intermediary phosphonate esters 6 were debenzoylated and subsequently transformed to free phosphonic acids, i.e. (S)-1-[3-hydroxy-2-(phosphonomethoxy)propyl]-5-phenylcytosine (5-phenyl-HPMPC) derivatives (8a-8d) by the action of bromotrimethylsilane and subsequent hydrolysis. Deamination of these compounds with 3-methylbutyl nitrite afforded corresponding (S)-1-[3-hyd

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8

Kanevskaya, I. V., N. V. Pchelintseva та O. V. Fedotova. "Functionalization of 4-hydroxy-6-methyl-2Н-pyran-2-one under the conditions of the modified Biginelli reaction". Журнал органической химии 59, № 4 (2023): 466–74. http://dx.doi.org/10.31857/s0514749223040055.

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The features of the interaction of 4-hydroxy-6-methyl-2 H -pyran-2-one with aromatic aldehydes and urea in the one-pot mode of the classical mode, as well as using thermal and microwave activation of The Biginelli reaction variants, were studied. Depending on the conditions of single-reactory processes, previously unknown 3-[amino(aryl)methyl]-4-hydroxy-6-methyl-2 H -pyran-2-one, arylmethylenebis-4-hydroxy-6-methyl-2 H -pyran2-one, hybrid system - 2-hydroxy-7-methyl-4-(3-nitrophenyl)-4,4a-dihydro-5 H -pyrano[4,3- d ]pyrimidine-5-one in the case of transformation with aryl aldehyde containing a

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9

Pawar, P. Y., P. M. Gaikwad, and P. H. Balani. "Microwave Assisted Synthesis of N-Substituted-7-hydroxy-4-methyl-2-oxoquinolines as Anticonvulsant Agents." E-Journal of Chemistry 8, no. 2 (2011): 945–51. http://dx.doi.org/10.1155/2011/121476.

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The reaction of resorcinol with ethylacetoacetate yielded the 7-hydroxy-4-methyl coumarin (1), which on treatment with benzidine gives 1-(4ʹ-amino-biphenyl-4-yl)-7-hydroxy-4-methyl-1H-quinolin-2-one (2). 1-{4ʹ-[(Substituted benzylidene)-amino]-biphenyl-4-yl}-7-hydroxy-4-methyl-1H-quinolin-2-one (3a-j) were obtained by reacting 1-(4ʹ-amino-biphenyl-4-yl)-7-hydroxy-4-methyl-1H-quinolin-2-one (2) with different substituted aromatic aldehydes in presence of glacial acetic acid by microwave irradiation. The compound 1-{4ɴ-[(substituted benzylidene)-amino]-biphenyl-4-yl}-7-hydroxy-4-methyl-1H-quinol

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10

Ma, Qing Zhi, Chao Feng Zeng, Wan Xi Peng, and Xu Zhang. "Analysis on Active Behavior of Bagasse by Py-GC-MS." Advanced Materials Research 230-232 (May 2011): 212–16. http://dx.doi.org/10.4028/www.scientific.net/amr.230-232.212.

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In order to find out its active behavior, the extractives of bagasse biomass were adsorbed and determined by Py-GC-MS. And the main constituents were 1-phenanthrenecarboxylic acid, 1,2,3,4,4a,9,10,10a-octahydro-1,4a-di methyl-7- (1-methylethyl)-(52.25%), stigmastan- 3,5-diene (11.3%), 2(1h)-phenanthrenone, 3,4,4a, 9,10,10a-hexahydro-7-hydroxy-1,1,4a-tri methyl-8- (1-methylethyl) - (9.00%), 2- furancarboxaldehyde, 5-(hydroxym ethyl)- (6.25%), etc.

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11

Burrett, Stacey, Dennis K. Taylor, and Edward R. T. Tiekink. "Corymbolone." Acta Crystallographica Section E Structure Reports Online 70, no. 7 (2014): o758. http://dx.doi.org/10.1107/s1600536814012938.

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The title compound, C15H24O2[systematic name: (4S,4aR,6R,8aR)-4a-hydroxy-4,8a-dimethyl-6-(prop-1-en-2-yl)octahydronaphthalen-1(2H)-one], features two edge-shared six-membered rings with the hydroxyl and methyl substituents at this bridge beingtrans. One adopts a flattened chair conformation with the C atoms bearing the carbonyl and methyl substituents lying 0.5227 (16) and 0.6621 (15) Å, respectively, above and below the mean plane through the remaining four C atoms (r.m.s. deviation = 0.0145 Å). The second ring, bearing the prop-1-en-2-yl group, has a chair conformation. Supramolecular helica

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12

Kostritskiy, Alexander Yu, Marina G. Nakonechnikova, Olga V. Fedotova, and Nina V. Pchelintseva. "Synthesis and Heterocyclization of 4-Hydroxy-3 - ((2-hydroxy-4,4-dimethyl-6-oxocyclohex1-en-1-yl) (aryl) methyl) -2H-chromen-2-ones." Izvestiya of Saratov University. New Series. Series: Chemistry. Biology. Ecology 20, no. 4 (2020): 362–71. http://dx.doi.org/10.18500/1816-9775-2020-20-4-362-371.

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The possibility of obtaining asymmetric 1,5-diketones based on 4-hydroxy-2H-chromen-2-one and dimedone by three-component condensation in the presence of L-proline as a catalyst is shown. As a result, a series of 4-hydroxy3 - ((2-hydroxy-4,4-dimethyl-6-oxocyclohex1-en-1-yl) (aryl) methyl) -2H-chromen-2-ones was obtained with a yield of 25 up to 73%. The study revealed that the highest yield was observed for compounds containing fragments of ortho-substituted aldehydes capable of forming a hydrogen bond. For meta- and para-substituted – the lowest yield was observed. In the case of ortho-substi

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13

Yin, Caixia, Fangjun Huo, and Pin Yang. "Methyl 2-[hydroxy(4-nitrophenyl)methyl]acrylate." Acta Crystallographica Section E Structure Reports Online 60, no. 8 (2004): o1332—o1333. http://dx.doi.org/10.1107/s1600536804016605.

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14

BEENA, RAWAT, and S. RAMA H. "Kinetics of Hydrolysis of Methyl Hydroxy and Methyl Methoxy Benzoates using Aquo-organic Solvents." Journal of Indian Chemical Society Vol. 71, Feb 1994 (1994): 103–5. https://doi.org/10.5281/zenodo.5893992.

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<em>Department of Chemistry, Faculty of Science, M.S. Umversity of Baroda, Baroda-390 002 Manuscript received 14 October 1992, revised 29 March 1993, accepted 13 April 1993</em> Kinetics of Hydrolysis of Methyl Hydroxy and Methyl Methoxy Benzoates using Aquo-organic Solvents.

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15

Maulidiyah, Maulidiyah, A. Herry Cahyana, and Wahyudi Priyono Suwarso. "A NEW PHENOLIC COMPOUND FROM ACETONE EXTRACT OF LICHEN Usnea flexuosa Tayl." Indonesian Journal of Chemistry 11, no. 3 (2011): 290–94. http://dx.doi.org/10.22146/ijc.21395.

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Natural product, 2'-hydroxy-1'-(4-hydroxyl-5-methoxy-2-methyl-phenyl)-ethanon, (1), was isolated from the thalli lichen Usnea flexuosa Tayl. together with the known (-) - usnic acid (2). The structure of compounds 1 and 2 were determined by the spectroscopic studies.

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16

Kumar, Ajay, Om Prakash, Mayank Kinger, and Shiv P. Singh. "Synthesis of some new 1-aryl-4-formyl-3-(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)pyrazoles using the Vilsmeier–Haack reaction — Isolation of the key intermediate 1-aryl-3-(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)pyrazoles." Canadian Journal of Chemistry 84, no. 3 (2006): 438–42. http://dx.doi.org/10.1139/v06-015.

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Arylhydrazones of dehydroacetic acid (DHA) underwent Vilsmeier–Haack reaction to generate the corresponding 1-aryl-4-formyl-3-(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)pyrazoles (1) with the pyrone moiety of the DHA remaining intact. However, when the reaction was performed using 1 equiv. of the reagent, compounds of 1-aryl-3-(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)pyrazoles (2a–2f) were obtained, which underwent smooth conversion to 1-aryl-4-formyl-3-(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)pyrazoles (1) on further treatment with another equivalent of the Vilsmeier–Haack reagent. This unreported

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17

O'Callaghan, Conor N., T. Brian H. McMurry, Sylvia M. Draper, and Elise Champeil. "Nitrile and Non-nitrile Pyridine Products from the Reaction of 2-Cyano-3-(x-nitrophenyl)prop-2-enamides with Methyl 3-Oxobutanoate." Journal of Chemical Research 23, no. 12 (1999): 690–91. http://dx.doi.org/10.1177/174751989902301203.

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The reaction of 2-cyano-3-(x-nitrophenyl)prop-2-enamides with methyl 3-oxobutanoate affords methyl 4-aryl-3-cyano-6-methyl-2-oxo-1,2-dihydropyridine-5-carboxylates, methyl 4-aryl-5-cyano-2-hydroxy-2-methyl-6-oxopiperidine-3-carboxylates, methyl 4-aryl-3-carbamoyl-6-methyl-2-oxo-1,2,3,4-tetrahydropyridine-5-carboxylates (the molecular structure of one of which has been confirmed by X-ray diffraction) and methyl 4-aryl-3-hydroxy-6-methyl-2-oxo-1,2-dihydropyridine-5-carboxylat.es.

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18

Sakdiyah, Yasminatul. "FORMULASI DAN UJI STABILITAS FISIK SEDIAAN GEL EKSTRAK ETANOL DAUN SIRSAK (Annona muricata L.) MENGGUNAKAN VARIASI KONSENTRASI HPMC." Jurnal Mahasiswa Kesehatan 4, no. 1 (2022): 32–44. http://dx.doi.org/10.30737/jumakes.v4i1.2042.

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Obat jerawat yang mengandung antibiotik sintetik dapat menimbulkan berbagai efek yang tidak diinginkan seperti iritasi dan resistensi. Daun sirsak (Anona muricataÂ L.) mengandung golongan senyawa metabolit sekunder yang memiliki efek antiinflamasi dan antibakteri yang berpotensi sebagai antijerawat. Dibutuhkan sediaan yang lebih praktis dan awet dalam penyimpanan. Gel dipilih karena memberi sensasi rasa dingin pada kulit dan mudah diaplikasikan di kulit. Gelling agent berpengaruh pada stabilitas gel. Penelitian ini bertujuan untuk mengetahui konsentrasi HPMC (Hydroxy Propyl Methyl Cellulose) y

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19

Buffinton, G. D., K. Öllinger, A. Brunmark, and E. Cadenas. "DT-diaphorase-catalysed reduction of 1,4-naphthoquinone derivatives and glutathionyl-quinone conjugates. Effect of substituents on autoxidation rates." Biochemical Journal 257, no. 2 (1989): 561–71. http://dx.doi.org/10.1042/bj2570561.

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DT-diaphorase catalysed the reduction of 1,4-naphthoquinones with hydroxy, methyl, methoxy and glutathionyl substituents at the expense of reducing equivalents from NADPH. The initial rates of quinone reduction did not correlate with either the half-wave reduction potential (E1/2) value (determined by h.p.l.c. with electrochemical detection against an Ag/AgCl reference electrode) or the partition coefficient of the quinones. After their reduction by DT-diaphorase the 1,4-naphthoquinone derivatives autoxidized at distinct rates, the extent of which was influenced by the nature of the substituen

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20

He, Ying, Yuan Jia, and Fachuang Lu. "New Products Generated from the Transformations of Ferulic Acid Dilactone." Biomolecules 10, no. 2 (2020): 175. http://dx.doi.org/10.3390/biom10020175.

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Various ferulic acid (FA) dimers occurring in plant cell walls, such as 8-5-, 8-O-4-, 5-5-, and 8-8-coupled dimers, are effective antioxidants and potential antimicrobials. It is necessary to access these diferulates as reference compounds to validate those isolated from plants. 3,6-bis(4-hydroxy-3-methoxyphenyl)-tetrahydrofuro-[3,4-c]furan-1,4-dione, a 8-8-coupled FA dilactone generated from ferulic acid via radical coupling, has been used to synthesize 8-8-coupled FA dimers although few reports investigated the distribution of products and mechanisms involved in the transformation of FA dila

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21

Rádai, Zita, Nóra Zsuzsa Kiss, Mátyás Czugler, Konstantin Karaghiosoff та György Keglevich. "The typical crystal structures of a few representative α-aryl-α-hydroxyphosphonates". Acta Crystallographica Section C Structural Chemistry 75, № 3 (2019): 283–93. http://dx.doi.org/10.1107/s2053229619001839.

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The crystal structures of seven α-aryl-α-hydroxyphosphonates synthesized by the Pudovik reaction of substituted benzaldehydes and dialkyl phosphites, namely dimethyl [(hydroxy)(phenyl)methyl]phosphonate, C9H13O4P, dimethyl [(3,4-dimethoxyphenyl)(hydroxy)methyl]phosphonate, C11H17O6P, dimethyl (1-hydroxy-1-phenylethyl)phosphonate, C10H15O4P, dimethyl [1-hydroxy-1-(4-nitrophenyl)ethyl]phosphonate, C10H14NO6P, dibenzyl [hydroxy(2-nitrophenyl)methyl]phosphonate, C21H20NO6P, dibenzyl [(3-chlorophenyl)(hydroxy)methyl]phosphonate, C21H20ClO4P, and dibenzyl [hydroxy(4-methylphenyl)methyl]phosphonate,

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22

Elix, JA, JA Elix, DA Venables, DA Venables, M. Wedin, and M. Wedin. "New Dibenzofurans and Depsides From the Lichen Bunodophoron patagonicum." Australian Journal of Chemistry 47, no. 7 (1994): 1335. http://dx.doi.org/10.1071/ch9941335.

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The lichen Bunodophoron patagonicum has been shown to contain five new dibenzo -furans: ascomatic acid (3,7-dimethoxy-1,9-dimethyldibenzofuran-2-carboxylic acid) (2) and the corresponding methyl ester (3); 7-O-methylnorascomatic acid (3-hydroxy-7-methoxy-1,9-dimethyldibenzofuran-2-carboxylic acid) (4) and the corresponding methyl ester (5); and norascomatic acid (3,7-dihydroxy-1,9-dimethyldibenzofuran-2-carboxylic acid) (6). The lichen also contains two new depsides : patagonic acid [2-hydroxy-4-(2′-hydroxy-4′-methoxy-6′-methyl-benzoyloxy)-6-(2′-oxononyl)benzoic acid] (10) and isopatagonic aci

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23

Amorim, Magali S., Alessandra F. Serain, Marcos José Salvador, and Maria Élida A. Stefanello. "Chemical Constituents of Sinningia hatschbachii." Natural Product Communications 12, no. 11 (2017): 1934578X1701201. http://dx.doi.org/10.1177/1934578x1701201128.

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A new naphthoquinone, 6-hydroxy-7-methoxy-2- O-methylduniol (1), was isolated from the tubers of Sinningia hatschbachii Chautems (Gesneriaceae), together with 10 known compounds: 7-hydroxy-α-dunnione, 7-hydroxy-6-methoxy-α-dunnione, 2,4,4’,6-tetramethoxydihydrochalcone, 4’-hydroxy-2,4,6-trimethoxydihydrochalcone, 4’,2-dihydroxy-4,6-dimethoxydihydrochalcone, methyl 1-hydroxy-4-methoxy-2-naphthoate, methyl 1,4-dimethoxy-2-naphthoate, methyl 4-hydroxybenzoate, calceolarioside B, and conandroside. All compounds were identified by spectroscopic techniques, and comparison with literature. Extracts i

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de Aquino, Pedro Everson Alexandre, Ítalo Rosal Lustosa, Caren Nádia Soares de Sousa, et al. "The N-Methyl-(2S, 4R)-trans-4-hydroxy-L-proline-Enriched Methanol Fraction from Sideroxylon obtusifolium Shows an Anticonvulsant Activity Associated with its Anti-inflammatory/Antioxidant Actions." Planta Medica International Open 07, no. 04 (2020): e158-e169. http://dx.doi.org/10.1055/a-1328-5093.

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AbstractEpilepsy is a neurological disorder characterized by recurrent seizures, resulting from excessive neuronal discharges. Sideroxylon obtusifolium is used in Brazil for its anti-inflammatory/antioxidant properties, known to be involved with epilepsy. The anticonvulsant effects of the methanol fraction from S. obtusifolium leaves, rich in N-methyl-(2S,4R)-trans-4-hydroxy-L-proline, were investigated on pilocarpine- and pentylenetetrazole-induced convulsion models. Mice were pretreated with N-methyl-(2S,4R)-trans-4-hydroxy-L-proline (50, 100, 200 mg/kg, p.o.) and, 1 h later, by pilocarpine

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Sarvaiya, Nikulsinh, Hitesh Samata, Sheetal Gulati, and H. Patel. "SYNTHESIS, CHARACTERIZATION AND ANTIMICROBIAL ACTIVITY OF PYRAZOLE-PYRIMIDONE CLUBBED DERIVATIVES." Rasayan Journal of Chemistry 15, no. 01 (2022): 564–68. http://dx.doi.org/10.31788/rjc.2022.1516656.

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4-(2-(1-(4-aryl-3-(furan-2-yl(hydroxy)methyl)-6-methyl-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carbonyl)-3-methyl5-oxo-1H-pyrazol-4(5H)-ylidene)hydrazinyl)-N-(thiazol-2-yl) benzene sulphonamides (2a-e) were synthesised by condensation of 4-(2-(1-(4-aryl-6-methyl-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carbonyl)-3-methyl-5-oxo-1Hpyrazol-4(5H)-ylidene) hydrazinyl)-N-(thiazol-2-yl) benzene sulphonamide (1a-e) with furfuraldehyde. The structures of all the compounds (2a-e) were characterized duly. The compounds were also monitored for antimicrobial activity.

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Kovalenko, Drushlyak, Konovalova, et al. "Novel One-Pot Synthesis of Methyl 4-Hydroxy-2-thioxo-1,2-dihydroquinoline-3-carboxylate: Synthetic and Crystallographic Studies." Molbank 2019, no. 4 (2019): M1085. http://dx.doi.org/10.3390/m1085.

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A new suitable method of synthesis of methyl 4-hydroxy-2-thioxo-1,2-dihydroquinoline-3-carboxylate by condensation of methyl 2-isothiocyanatobenzoate and methyl malonate is described. The structure of the compound both and by-product methyl 2(methoxycarbonothioylamino)benzoate was confirmed by means of elemental analysis, 1H NMR, 13C NMR, LC/MS and single crystal X-ray diffraction. UV/Vis and IR spectra of compounds are described. The presence of a strong intramolecular hydrogen bond between the hydroxy group and the carbonyl oxygen atom of the ester group in methyl 4-hydroxy-2-thioxo-1,2-dihy

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Krawczyk-Łebek, Agnieszka, Monika Dymarska, Tomasz Janeczko, and Edyta Kostrzewa-Susłow. "New Glycosylated Dihydrochalcones Obtained by Biotransformation of 2′-Hydroxy-2-methylchalcone in Cultures of Entomopathogenic Filamentous Fungi." International Journal of Molecular Sciences 22, no. 17 (2021): 9619. http://dx.doi.org/10.3390/ijms22179619.

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Flavonoids, including chalcones, are more stable and bioavailable in the form of glycosylated and methylated derivatives. The combined chemical and biotechnological methods can be applied to obtain such compounds. In the present study, 2′-hydroxy-2-methylchalcone was synthesized and biotransformed in the cultures of entomopathogenic filamentous fungi Beauveria bassiana KCH J1.5, Isaria fumosorosea KCH J2 and Isaria farinosa KCH J2.6, which have been known for their extensive enzymatic system and ability to perform glycosylation of flavonoids. As a result, five new glycosylated dihydrochalcones

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Patel, P. K., and P. D. Dpatel. "Metal Complexation Studies of 1-(4-Carboxy-3-hydroxy-4-phenyl amino methyl) benzotriazole." E-Journal of Chemistry 6, no. 2 (2009): 475–80. http://dx.doi.org/10.1155/2009/962167.

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Aminomethylation of benzotriazole was carried out by treating benzotrialzole with formaldehyde and 4-aminosalicylic acid. The resultant compound was designed as 1-(4-carboxy-3-hydroxy-4-phenyl amino methyl) benzotriazole. The transition metal complex of Cu2+, Co2+, Ni2+, Mn2+, and Zn2+, of 1-(4-carboxy-3-hydroxy-4-phenyl amino methyl) benzotriazole have been prepared. Elemental analysis, spectral studies, magnetic moment determination, molar conductivity measurement and microbial activity of 1-(4-carboxy-3-hydroxy-4-phenyl amino methyl) benzotriazole and its metal complexes were carried out.

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29

Shokol, Tatyana, Natalia Gorbulenko, Magdalina Tsapko, and Volodymyr Khilya. "Mannich Bases of Chromones Containing a 2,3-fused Heterocyclic Ring." French-Ukrainian Journal of Chemistry 12, no. 1 (2024): 1–16. https://doi.org/10.17721/fujcv12i1p1-16.

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Aminomethylation of chromones сontaining a 2,3-fused heterocyclic ring, such as indolizine, pyrroloquinoline and pyrrolothiazole, namely 9-hydroxy-6/8-alkyl-12H-chromeno[3,2-a]indolizin-12-ones, 10-(alk)oxy-9-R-7Н-сhromeno[3',2':3,4]pyrrolo[1,2-а]quinolin-7-ones and 9-alkyl-8-hydroxy-3-methyl-5-R-11H-chromeno[3’,2’:3,4]pyrrolo[2,1-b][1,3]thiazol-11-ones with bisdialkylaminomethanes was studied. The α-position of the pyrrole ring and the ortho-positions to the hydroxyl group in the benzene ring in the above mentioned systems are active sites and the Mannich reaction can occur at these three pos

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30

Kavitha Chandran C I, Rakesh Kumar Jat, and Revikumar Kallamparambil Gopalan. "Phytochemical and bioactive compounds identification of Ficus auriculata fig methanolic extraction and its antioxidant activity." GSC Biological and Pharmaceutical Sciences 21, no. 2 (2022): 246–54. http://dx.doi.org/10.30574/gscbps.2022.21.2.0453.

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In the current investigation, a new phytoconstituent was isolated and identified from a methanolic extract of Ficus auriculata Lour figs. Naturally occurring phytoconstituents have been used to treat ailments for a long time and have served as a source of structural variety for natural product chemists. Natural products are frequently mentioned as a rich source of chemical variation when looking for new pharmacological leads or molecules. The analysis of the chemical components of the methanolic extract led to the discovery of a new phytoconstituent, 5-hydroxy-2-(4-hydroxy-2-methyl-2H-pyran-6-

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31

Hřebabecký, Hubert, and Antonín Holý. "Synthesis of Carba Analogues of 2'-Deoxy-4'-C-(hydroxymethyl)nucleosides." Collection of Czechoslovak Chemical Communications 64, no. 9 (1999): 1485–96. http://dx.doi.org/10.1135/cccc19991485.

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Racemic dimethyl 2-hydroxy-4-[5-methyl-2(1H),4(3H)-dioxopyrimidin-1-yl]- (7a and 8a) and dimethyl 4-(6-aminopurin-9-yl)-2-hydroxycyclopentane-1,1-dicarboxylates (7b and 8b) were prepared by addition of sodium salt of thymine and adenine, respectively, to dimethyl (Z)-(4-oxobut-2-en-1-yl)malonate (1). Reduction of the diesters with sodium borohydride in methanol in the presence of sulfuric acid gave corresponding racemic 2,2-bis(hydroxymethyl)-4-[5-methyl-2(1H),4(3H)-dioxopyrimidin-1-yl]- (14a and 15a), 4-(6-aminopurin- 9-yl)-2,2-bis(hydroxymethyl)cyclopentan-1-ol (14b and 15b), methyl (±)-cis-

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32

Xie, Cheng Ping, Kai Fu Li, Jin Ling Lin, and Jian Bian Li. "GC-MS Analysis on Heartwood Extractive Chemical Components of Different Provenances Teak（Tectona Grandis L.f.）." Advanced Materials Research 236-238 (May 2011): 1049–53. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.1049.

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Teak (Tectona grandisL.f) is decay resistance and natural durability. These advantages are relationship with inclusion of teak. For breeding, planting, and the wood used to its best advantage by the end-user, further information concerning the heartwood extractive chemical of different provenances teak is necessary, However, because of limitation of analytical instruments, the extractive chemical components of teak centre on decay resistance relationship with napthoquinone, tectoquinone, and so on, nobody systematacially analyzed heartwood extractive chemical components of different teak. We a

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33

Dr., M. Sunitha Reddy* and Gadam Charitha. "FORMULATION AND IN-VITRO CHARACTERIZATION OF LOSARTAN POTASSIUM AND REPAGLINIDE BILAYER TABLETS." Indo American Journal of Pharmaceutical Sciences 04, no. 12 (2017): 4207–13. https://doi.org/10.5281/zenodo.1095022.

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The purpose of this study is to formulate and evaluate bilayer anti-hypertensive and anti-diabetic tablets. Bilayer tablet contains Losartan potassium for immediate release and Repaglinide for a sustained release. The bilayer tablets were prepared using crospovidone and sodium starch glycolate as super-disintegrants for the immediate release layer, hydroxyl propyl methyl cellulose K 100M and hydroxyl propyl methyl cellulose K 15M as polymers at various concentrations to retard the release of drug for a period of time. Immediate release layer was prepared by direct compression and wet granulati

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34

An, Li-Tao, Gui-Xia Gong, Xing Liu, Min Xia, and Jian-Feng Zhou. "Diethyl [hydroxy(phenyl)methyl]phosphonate." Acta Crystallographica Section E Structure Reports Online 64, no. 7 (2008): o1320. http://dx.doi.org/10.1107/s1600536808018424.

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35

Jin, Long-Fei, and Feng-Ping Xiao. "Methyl 1-hydroxy-2-naphthoate." Acta Crystallographica Section E Structure Reports Online 61, no. 5 (2005): o1520—o1522. http://dx.doi.org/10.1107/s1600536805012626.

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36

Fang, Hua, Mei-Juan Fang, Zhi-Ping Zeng, Zan-Bin Wei, and Yu-Fen Zhao. "Dimethyl [hydroxy(phenyl)methyl]phosphonate." Acta Crystallographica Section E Structure Reports Online 62, no. 4 (2006): o1378—o1379. http://dx.doi.org/10.1107/s1600536806008294.

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The title compound, C9H13O4P, has been obtained by the reaction of dimethyl phosphite and benzaldehyde. In the crystal structure, intermolecular O—H...O hydrogen bonds link the molecules into infinite chains.

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37

Liu, Yan-Zhu, Yong-Xiu Li, Ling Zhang, and Xia Li. "Methyl 2-hydroxy-3-nitrobenzoate." Acta Crystallographica Section E Structure Reports Online 65, no. 7 (2009): o1716. http://dx.doi.org/10.1107/s1600536809024301.

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38

Patel, Darshana D., and Vikram N. Panchal. "Studies on Metal Complexes of Pyrazole Bearing Ligand with Their Antimicrobial Screening." Oriental Journal Of Chemistry 40, no. 5 (2024): 1394–98. http://dx.doi.org/10.13005/ojc/400522.

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In present research article, we reported the synthesise of novel hetertocyclic ligand namely,5-((3-((1H-benzimidazol-1-yl)methyl)-5-phenyl-1H-pyrazol-1-yl) methyl)-8-hydroxy quinoline (BIPPHQ) from 5-chloro methyl-8-hydroxy quinoline and 1-((5-phenyl-1H-pyrazol-3-yl) methyl)-1H-benzimidazole (BIPP). The BIPP was synthsised by the reaction between hydrazine hydrate with 1-(1H-benzimidazol-1-yl)-4-phenylbut-3-en-2-one (BIPB), which was synthesisd from 1-(1H-benzimidazol-1-yl)propan-2-one (BIP) and benzaldehyde. The transition metal complxes of 5-((3-((1H-benzimidazol-1-yl)methyl)-5-phenyl-1H-pyr

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39

Charlton, James L., David Bogucki, and Peng Guo. "Unsymmetrical dienophiles and their reactions with ortho-quinodimethanes." Canadian Journal of Chemistry 73, no. 9 (1995): 1463–67. http://dx.doi.org/10.1139/v95-181.

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Three unsymmetrical chiral dienophiles have been synthesized and their reactivities with α-hydroxy-ortho-quinodimethanes have been assessed. Thus, the methyl (S)-lactyl esters of trans-4-bromocrotonate and trans-4-acetoxycrotonate (1 and 2) and mono (methyl (S)-lactyl) fumarate 3 were synthesized. Each was reacted with α-hydroxy-o-quinodimethane and α-hydroxy-α-phenyl-o-quinodimethane. While reaction with α-hydroxy-o-quinodimethane gave synthetically useful yields of cycloadducts with high regioselectivity and diastereoselectivity, the corresponding reactions with α-hydroxy-α-phenyl-o-quinodim

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40

Hřebabecký, Hubert, Martin Dračínský, Armando M. De Palma, Johan Neyts, and Antonín Holý. "Synthesis of novel carbocyclic nucleoside analogues derived from 7-oxabicyclo[2.2.1]heptane-2-methanol." Collection of Czechoslovak Chemical Communications 74, no. 3 (2009): 487–502. http://dx.doi.org/10.1135/cccc2008204.

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Hydroboration of [(1R*,2R*,4R*)-7-oxabicyclo[2.2.1]hept-5-en-2-yl]methyl benzoate (5), which was prepared by Diels–Alder reaction of furan with acrolein and subsequent reduction and benzoylation of the Diels–Alder product, afforded [(1R*,2S*,4S*,6S*)-6-hydroxy-7-oxabicyclo[2.2.1]heptan-2-yl]methyl benzoate (6) and [(1R*,2R*,4R*,5S*)-5-hydroxy-7-oxabicyclo[2.2.1]heptan-2-yl]methyl benzoate (7). The key intermediates, [(1R*,2S*,4S*,6R*)-6-hydroxy-7-oxabicyclo[2.2.1]heptan-2-yl]methyl benzoate (10) and [(1R*,2R*,4R*,5R*)-5-hydroxy-7-oxabicyclo[2.2.1]heptan-2-yl]methyl benzoate (11), were prepared

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41

Hussein, J. Hussein, Mohammed Ubaid Jenan, and Hadi Hameed Imad. "Gas Chromatography – Mass Spectrum Analysis of Volatile Components of Methanolic Leaves Extract of Cordia Myxa." International Journal of Current Pharmaceutical Review and Research 7, no. 6 (2016): 400–406. https://doi.org/10.5281/zenodo.12680247.

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Medicinal plants have been used to treat human diseases for thousands of years because they have vast and diverseassortment of organic compounds that can produce a definite physiological action on the human body. The objectives ofthis study were analysis of the secondary metabolite products of methanolic leaf extract of Cordia myxa. The identificationof bioactive chemical compounds is based on the peak area, retention time molecular weight and molecular formula. GCMS analysis of Cordia myxa revealed the existence of the 2-[3-Cyclohexylaminopropylamino] ethylthiophosphate,Spiro[2.4]heptan-4-one

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42

Peng, Wan Xi, Qiu Xue, Feng Juan Wu, Xu Zhang, and Zhong Feng Zhang. "Assessment on Environmental Friendly Characteristics of Smoked Bamboo Biomass for Building Materials." Advanced Materials Research 183-185 (January 2011): 1832–36. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.1832.

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The main constituents at 230°С were propanoic acid, 2-(aminooxy)-(16.99%) , propanamide, 2-hydroxy-n-methyl-(14.20%) , benzaldehyde, 2-methyl-(13.22%) , furfural(9.44%) , butanal, 2-methyl-(8.09%) , acetic acid(7.09%) , hydrazine, methyl-(4.14%) , etc. And the main constituents at 280°С were hydrazine, ethyl-(24.87%) , 2(3h)-furanone, dihydro-4-hydroxy-(15.24%) , phenol, 2,6-dimethoxy-(11.82%) , benzaldehyde, 2-methyl-(11.49%) , furfural(4.90%) , etc. The heat release volatiles of smoked bamboo biomass might be used as raw materials of rare biomedicines. So the smoked bamboo biomass for buildi

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43

Krawczyk-Łebek, Agnieszka, Monika Dymarska, Tomasz Janeczko, and Edyta Kostrzewa-Susłow. "Entomopathogenic Filamentous Fungi as Biocatalysts in Glycosylation of Methylflavonoids." Catalysts 10, no. 10 (2020): 1148. http://dx.doi.org/10.3390/catal10101148.

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Flavonoids are known for their numerous biological activities; however, their pharmacological application is limited by poor bioavailability. Glycosides are usually more stable and more soluble in water and in this form, flavonoids are present in nature. Likewise, the presence of the methyl group in the flavonoid skeleton results in facilitated absorption and greater bioavailability. Entomopathogenic filamentous fungi are effective in the biotransformation of flavonoids; they are known especially for efficient glycosylation. In the current study we used strains of Beauveria bassiana KCH J1.5 a

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44

Elix, JA, DA Venables, and L. Brako. "New Chlorine-Containing Depsidones From the Lichen Phyllopsora corallina var. ochroxantha." Australian Journal of Chemistry 43, no. 11 (1990): 1953. http://dx.doi.org/10.1071/ch9901953.

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The depsidones phyllopsorin (2-chloro-4,6-diformyl-3-hydroxy-8-methoxy- 1,9-dimethyl-11H-dibenzo[ b,e ][1,4]dioxepin-11-one (3), chlorophyllopsorin (2,7-dichloro-4,6-diformyl-3-hydroxy-8-methoxy-1,9- dimethyl-11H-dibenzo[ b,e ][1,4]dioxepin-11-one) (4), methyl 2,7- dichloro-psoromate (methyl 2,7-dichloro-4-formyl-3-hydroxy-8-methoxy- 1,9-dimethyl-11-oxo-11H-dibenzo[ b,e ][1,4]dioxepin-6-carboxylate) (5) and methyl 2,7-dichloronorpsoromate (methyl 2,7-dichloro-4-formyl-3,8- dihydroxy-1,9-dimethyl-11-oxo-11H-dibenzo[ b,e ][1,4]dioxepin-6-carb- oxylate ) (6) have been isolated from the lichen Phy

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45

Nalam, Vasanth Kumar, and C. Mashelkar Uday. "Synthesis of novel3-substituted derivatives of 2H-pyrano[2,3- b]pyridine-2-one moiety." Journal of Indian Chemical Society Vol. 84, Oct 2007 (2007): 1048–51. https://doi.org/10.5281/zenodo.5827275.

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Organic Research Laboratory, SS & LS Patkar College, S. V. Road, Goregaon (West), Mumbai-400 062, India <em>E-mail</em>: vknalam@yahoo.com <em>Manuscript received 17 April 2007, accepted 20 July 2007</em> New 3-substitutcd-5-methyl-7 -hydroxy-2-oxo-2<em>H</em>/-pynmo[2,3-b )pyridine-6-carbonytrile were prepared by cyclisation of 5-methyl-6-cyano-7 -hydroxy-2-oxo-2<em>H</em>/-pyrano[2,3-b)pyridinc-3-carhohydrazidc and 3-(5-methyl thioscmicarbazidc)-5-methyl-7 -hydroxy-2-oxo2<em>H</em>/-pyrano[2,3-b]pyridinc-6-carbonytrilc with different cyclization reagents. The structures of all compounds

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46

Lefedova, Olga V., Hoang Anh, and Dmitriy V. Filippov. "HYDROGEN ROLE IN SELECTIVITY OF SUBSTITUTED NITRO-AZOBENENES HYDROGENI-ZATION ON SKELETAL NICKEL IN 2-PROPANOL AQUEOUS SOLUTIONS." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 63, no. 6 (2020): 65–71. http://dx.doi.org/10.6060/ivkkt.20206306.6057.

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Elucidation of the substituted nitrobenzenes transformations sequence, in particular, containing several reactive groups and the development of approaches to the control of the selectivity of processes involving them is of interest from both theoretical and practical points of view. The article is devoted to the analysis of the hydrogenation kinetics of 2-nitro-2'-hydroxy-5'-methylazobenzene, 4-nitro-2'-hydroxy-5'-methyl-isobenzene, 4-nitroaniline, 4-amino-2'-hydroxy-5'-methylazobenzene on skeletal nickel in 2-propanol aqueous solutions of different composition, including with the addition of

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47

Kavitha, Chandran C. I., Kumar Jat Rakesh, and Kallamparambil Gopalan Revikumar. "Phytochemical and bioactive compounds identification of Ficus auriculata fig methanolic extraction and its antioxidant activity." GSC Biological and Pharmaceutical Sciences 21, no. 2 (2022): 246–54. https://doi.org/10.5281/zenodo.7652842.

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In the current investigation, a new phytoconstituent was isolated and identified from a methanolic extract of <em>Ficus auriculata</em> Lour figs. Naturally occurring phytoconstituents have been used to treat ailments for a long time and have served as a source of structural variety for natural product chemists. Natural products are frequently mentioned as a rich source of chemical variation when looking for new pharmacological leads or molecules. The analysis of the chemical components of the methanolic extract led to the discovery of a new phytoconstituent, 5-hydroxy-2-(4-hydroxy-2

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48

Kamar, Afaf, Alexander Baldwin Young, and Raymond Evans March. "A comparative ion chemistry study of acetone, diacetone alcohol, and mesityl oxide." Canadian Journal of Chemistry 64, no. 10 (1986): 1979–88. http://dx.doi.org/10.1139/v86-328.

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The evolution of ion species by unimolecular and bimolecular reactions, both concurrent and sequential, has been investigated for each of 2-propanone, d6-2-propanone, 4-hydroxy-4-methyl-2-pentanone, and 4-methyl-3-penten-2-one. Infrared multiphoton dissociation (IRMPD) has been used in order to differentiate between gaseous ionic isomers. It is concluded that the isomeric species, protonated 2-propanone dimer and protonated 4-hydroxy-4-methyl-2-pentanone, both of m/z 117, are of different structures. The ion species C6H11O+ of m/z 99, and its perdeuterated analogue, which is observed in all th

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49

Feld, Hildegard, David S. Rycroft, and Josef Zapp. "Chromenes and Prenylated Benzoic Acid Derivatives from the Liverwort Pedinophyllum interruptum." Zeitschrift für Naturforschung B 59, no. 7 (2004): 825–28. http://dx.doi.org/10.1515/znb-2004-0713.

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The chemical composition of a diethyl ether extract of the Scottish liverwort Pedinophyllum interruptum has been examined. Two new prenylated benzoic acid derivatives, methyl 2,6- dihydroxy-4-methoxy-3-(3’-methyl-2’-butenyl)benzoate and methyl 2,4,6-trihydroxy-3-(3’-methyl- 2’-butenyl)benzoate, two new chromenes, methyl 5,7-dihydroxy-2,2-dimethyl-2H-chromene-6- carboxylate and methyl 7-hydroxy-5-methoxy-2,2-dimethyl-2H-chromene-8-carboxylate, and the two known chromenes methyl 8-hydroxy-2,2-dimethyl-2H-chromene-6-carboxylate and methyl 8- methoxy-2,2-dimethyl-2H-chromene-6-carboxylate were iso

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50

Ostrowska, Kinga, Gabriela Horosz, Karolina Kruk, et al. "Exploring the Potential of Coumarin Derivatives on Serotonin Receptors 5-HT1A and 5HT2A." International Journal of Molecular Sciences 26, no. 5 (2025): 1946. https://doi.org/10.3390/ijms26051946.

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A series of 2- and 3-methoxyphenylpiperazine derivatives in combination with a 2-hydroxypropoxy linker and coumarins containing various substituents was synthesized and evaluated for antidepressant-like activity. Microwave-assisted synthesis was used, and the structures of all compounds were confirmed by 1H, 13C NMR, and HRMS spectrometry. The affinity toward the 5-HT1A and 5-HT2A receptors was determined using radioligand binding assays and analyzed by molecular docking studies. Among the compounds evaluated, four demonstrated high affinity for the 5-HT1A receptor with the following Ki values

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