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Journal articles on the topic 'Cyclocondensation [3+2]'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

Kamimura, Akio, and Akikazu Kakehi. "Diastereoselective Cyclocondensation Reaction of 3-Formyl-2-isoxazolines." Chemistry Letters 21, no. 7 (1992): 1133–36. http://dx.doi.org/10.1246/cl.1992.1133.

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2

Jafari, Behzad, Sayfidin Safarov, Muattar Khalikova, Peter Ehlers, and Peter Langer. "Synthesis of 1,3,4-Thiadiazolo[2′,3′:2,3]imidazo[4,5-b]indoles." Synlett 30, no. 15 (2019): 1791–94. http://dx.doi.org/10.1055/s-0039-1690147.

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Hitherto unknown thiadiazolo[2′,3′:2,3]imidazo[4,5-b]indoles were synthesized for the first time by base-mediated cyclocondensation, bromination, and subsequent cyclization by two-fold Buchwald–Hartwig reactions.

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3

Marchalín, Štefan, and Josef Kuthan. "Cyclocondensation reactions of 3-aryl-2-benzylidene-3-oxopropanenitriles with acetylaromatic derivatives." Collection of Czechoslovak Chemical Communications 50, no. 8 (1985): 1862–69. http://dx.doi.org/10.1135/cccc19851862.

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Cyclocondensation of 3-aryl-2-benzylidene-3-oxopropanenitriles Ia and Ib with acetyl aromatic derivatives IIa-IIc in the presence of ammonium acetate affords 2,6-diaryl-4-phenyl-3-cyanopyridines IV and V. Reaction of the nitrile Ib with 1,2-diphenylethanone (III) gave 2-(4-biphenylyl)-4,5,6-triphenyl-3-cyanopyridine (VI). The relation between the structure of the synthesized pyridine derivatives IV-VI and their spectral properties is discussed.

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4

Nayak, Prakash S., Badiadka Narayana, Hemmige S. Yathirajan, Eric C. Hosten, Richard Betz, and Christopher Glidewell. "(2E)-3-(6-Methoxynaphthalen-2-yl)-1-(pyridin-3-yl)prop-2-en-1-one and its cyclocondensation product with guanidine, (4RS)-2-amino-4-(6-methoxynaphthalen-2-yl)-6-(pyridin-3-yl)-3,4-dihydropyrimidine monohydrate: two types of hydrogen-bonded sheet." Acta Crystallographica Section C Structural Chemistry 70, no. 11 (2014): 1011–16. http://dx.doi.org/10.1107/s2053229614021524.

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The structures of a chalcone and of its cyclocondensation product with guanidine are reported. In (2E)-3-(6-methoxynaphthalen-2-yl)-1-(pyridin-3-yl)prop-2-en-1-one, C19H15NO2, (I), the planes of the pyridine and naphthalene units make dihedral angles with that of the central spacer unit of 23.61 (13) and 23.57 (15)°, respectively, and a dihedral angle of 47.24 (9)° with each other. The molecules of (I) are linked into sheets by a combination of C—H...O and C—H...π(arene) hydrogen bonds. In the cyclocondensation product (4RS)-2-amino-4-(6-methoxynaphthalen-2-yl)-6-(pyridin-3-yl)-3,4-dihydropyri

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5

Gao, Zhong-Hua, Xiang-Yu Chen, Jin-Tang Cheng, Wei-Lin Liao та Song Ye. "N-Heterocyclic carbene-catalyzed [2+3] cyclocondensation of α-chloroaldehydes with azomethine imines". Chemical Communications 51, № 45 (2015): 9328–31. http://dx.doi.org/10.1039/c5cc01238d.

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The N-heterocyclic carbene-catalyzed enantioselective [2+3] cyclocondensation of α-chloroaldehydes with azomethine imines was developed to give the corresponding pyrazolidinones in good yields with excellent enantioselectivities.

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6

Reddy, Swetha, Srinivas Thadkapally, Mounika Mamidyala, Jagadeesh Babu Nanubolu, and Rajeev S. Menon. "A convenient synthesis of 2-substituted benzofurans from salicylaldehydes." RSC Advances 5, no. 11 (2015): 8199–204. http://dx.doi.org/10.1039/c4ra14948c.

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Base-mediated cyclocondensation of 2-hydroxybenzaldehydes with 3-bromo-1-(arylsulfonyl)propenes and 4-bromocrotonates afforded (E)-2-(2-sulfonylvinyl)benzofurans and (E)-2-benzofuranyl-3-acrylates, respectively.

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7

Pryadeina, M. V., A. B. Denisova, Ya V. Burgart, and V. I. Saloutin. "Regioselective cyclocondensation of ethyl 2-ethoxymethylidene-3-oxo-3-polyfluoroalkylpropionates with thiazolylhydrazines." Russian Journal of Organic Chemistry 44, no. 12 (2008): 1811–15. http://dx.doi.org/10.1134/s1070428008120166.

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8

Ullah, Mohammad Shahid, M. Giasuddin Ahmed, UKR Romman, Kawsari Akhter, S. Mosaddeq Ahmed, and Md Ershad Halim. "Synthesis Of 5, 7-Diaryl-1,5-Dihydro (Or 1, 2, 3, 5-Tetrahydro)- Pyrano[2, 3-D] Pyrimidin-2, 4-Diones (Or 2-Thioxo-4-Ones)." Journal of the Bangladesh Chemical Society 25, no. 2 (2013): 124–31. http://dx.doi.org/10.3329/jbcs.v25i2.15064.

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Some 5, 7-diaryl-1,5-dihydro (or 1, 2, 3, 5-tetrahydro)- pyrano[2, 3-d] pyrimidin-2, 4- diones (or 2-thioxo-4-ones) (3a-g) has been synthesized in one-step by the cyclocondensation of barbituric acid or thiobarbituric acid (1) with arylideneacetophenones (2a-d), in glacial acetic acid in the presence of phosphorous pentoxide. The structures of the compounds 3a-g were determined by their UV, IR, 1H NMR, 13C NMR, mass spectral data and elemental analyses. Journal of Bangladesh Chemical Society, Vol. 25(2), 124-131, 2012 DOI: http://dx.doi.org/10.3329/jbcs.v25i2.15064

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9

Maiboroda, E. I., and V. N. Britsun. "Cyclocondensation of N-aryl-3-oxobutanethioamides with 2-aminoimidazole and 2-aminobenzimidazole." Russian Journal of Organic Chemistry 44, no. 8 (2008): 1200–1204. http://dx.doi.org/10.1134/s1070428008080162.

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10

KAMIMURA, A., and A. KAKEHI. "ChemInform Abstract: Diastereoselective Cyclocondensation Reaction of 3-Formyl-2- isoxazolines." ChemInform 24, no. 14 (2010): no. http://dx.doi.org/10.1002/chin.199314082.

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11

Dölling, Wolfgang, Almut Vogt, and Manfred Augustin. "Synthesen von 1,3-Dithiol-2-on-Derivaten,2-Ethylthio-1,3-dithiolium-tetrafluoroboraten und Thieno[2,3-d]-1,3-dithiol-2-thionen / Synthesis of 1,3-Dithiole-2-one Derivatives, 2-Ethylthio-1,3-dithiolium Tetrafluoroborates, and Thieno[2,3-d]-1,3-dithiole-2-thiones." Zeitschrift für Naturforschung B 46, no. 2 (1991): 133–38. http://dx.doi.org/10.1515/znb-1991-0201.

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Substituted 1,3-dithiole-2-ones 2 a - f are obtained by reaction of 1,3-dithiole-2-thiones 1 a - f with mercuric acetate. The thiones 3 react with triethyloxoniumtetrafluoroborate giving 1.3-dithiolium salts 4 a - h . The cyclocondensation of compounds 3 to thieno[2,3-d]-1,3-dithiole- 2-thiones 6 a - c is described. The first synthesis of 5-methylthio-2-thioxo-1,3-dithiole- 4-carboxylic acid is reported.

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12

Rahman, M. Mahbubur, S. Mosaddeq Ahmed, SMA Hakim Siddiki, et al. "A One Pot Synthesis of 5, 7-diaryl-1,5-dihydro (or 1, 2, 3, 5-tetrahydro)- pyrano[2, 3-D] pyrimidin-2, 4-diones (or 2-thioxo-4-ones)." Dhaka University Journal of Science 61, no. 2 (2013): 167–71. http://dx.doi.org/10.3329/dujs.v61i2.17065.

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A number of 5, 7-diaryl-1,5-dihydro (or 1, 2, 3, 5-tetrahydro)- pyrano[2, 3-d] pyrimidin-2, 4-diones (or 2-thioxo-4-ones) (3a-f) have been synthesized in one-step by cyclocondensation of barbituric acid or thiobarbituric acid (1) with arylideneacetophenones (2a-c), in glacial acetic acid in the presence of phosphorous pentoxide. The structures of the compounds 3a-f have been determined by UV, IR, 1H NMR, 13C NMR, mass spectral data and elemental analyses. DOI: http://dx.doi.org/10.3329/dujs.v61i2.17065 Dhaka Univ. J. Sci. 61(2): 167-171, 2013 (July)

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13

Halim, ME, K. Akhter, M. Hasan, MM Rahman, UKR Romman, and MG Ahmed. "Synthesis of potential pharmaceutically active dihydropyrimidine-2-oxo and their 2-thio analogues." Bangladesh Journal of Scientific and Industrial Research 53, no. 4 (2018): 327–32. http://dx.doi.org/10.3329/bjsir.v53i4.39198.

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The Biginelli one - pot three-component cyclocondensation was applied to prepare 3, 4 - dihydropyrimidin - 2 (1H) – ones from aldehydes, β-dicarbonyl compounds and urea (or thiourea) using ZnCl2 as a catalyst. The method offers several advantages including short reaction times and easy experimental work up procedures.Bangladesh J. Sci. Ind. Res.53(4), 327-332, 2018

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14

Heaney, Frances, and Elaine Lawless. "2-Vinyl quinazoline 3-oxides; Preparation from acid induced cyclocondensation of 2-acylaminoaryloximes." Journal of Heterocyclic Chemistry 44, no. 3 (2007): 569–74. http://dx.doi.org/10.1002/jhet.5570440311.

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15

Cholakova, Ts P., and Kh Ivanov. "Cyclocondensation of 3-aryl-2-cyano-2-butenoic acid esters with schiff bases." Chemistry of Heterocyclic Compounds 24, no. 2 (1988): 173–75. http://dx.doi.org/10.1007/bf00473327.

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16

Pfeiffer, Wolf-Diethard, Helmut Gille, Ehrenfried Bulka, Ashot Saghyan, and Peter Langer. "Cyclocondensations of Substituted Thiosemicarbazides with 2-Bromo- 1,2-diphenylethan-1-one." Zeitschrift für Naturforschung B 68, no. 7 (2013): 823–30. http://dx.doi.org/10.5560/znb.2013-3036.

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The cyclocondensation of 4-methylthiosemicarbazide with 2-bromo-1,2-diphenylethan-1-one in ethanol afforded isomeric 2-methylamino-5,6-diphenyl-6H-3,4-thiadiazine and 2-hydrazono-3- methyl-4,5-diphenyl-2,3-dihydro-1,3-thiazole. A pyrazole was obtained by cyclocondensation and subsequent desulfurization of the thiadiazine when the reaction was carried out in concentrated hydrochloric acid. A chemical proof of the structures has been provided. The product distribution of the cyclizations strongly depends on the substitution pattern of the starting materials, and the cyclizations of methylthiosem

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17

Nemes, Péter, Mária Kajtár-Peredy, and Pál Scheiber. "Synthesis of Dihydropyrrolo[2,1-a]isoquinolines by Regioselective [3+2] Cyclocondensation." Synlett 1996, no. 07 (1996): 623–24. http://dx.doi.org/10.1055/s-1996-5542.

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18

Habashneh, Almeqdad Y., Mustafa M. El-Abadelah, Mohammed M. Abadleh, and Wolfgang Voelter. "Heterocycles [c]-Fused onto Indoloquinoxaline. Synthesis of Novel Pyrano[2’,3’:4,5]indolo[2,3-b]quinoxalin-2-ones." Zeitschrift für Naturforschung B 67, no. 7 (2012): 725–30. http://dx.doi.org/10.5560/znb.2012-0131.

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A synthesis of 4-methylpyrano[2,3-e]indole-2,8,9-trione (5) is achieved from 7-amino-4- methylcoumarin by adopting the classical Sandmeyer methodology. The cyclocondensation reaction of pyrano-isatin 5 with the appropriately substituted o-phenylenediamines 6 in polyphosphoric acid proceeded regioselectively to furnish the respective pyrano[2’,3’:4,5]indolo[2,3-b]quinoxalines 7a - c. Structural assignments of the new compounds are based on microanalytical and spectral (IR, MS and NMR) data.

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19

Li, Wenhao, Wenxue Duan, Qingxuan Tang, Zhan-Ting Li, and Guanyu Yang. "Simple and efficient syntheses of 2-hydroxy-3H-phenoxazin-3-ones by aerobic oxidative cross-cyclocondensation in water." Green Chemistry 23, no. 3 (2021): 1136–39. http://dx.doi.org/10.1039/d0gc03861j.

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The renewable gallic acid-mediated aerobic oxidative cross-cyclocondensation of equimolar 2-aminophenols and 2-hydroxylphenols assisted by inexpensive Mn(OAc)<sub>2</sub> afforded efficiently 2-hydroxyl-phenoxazin-3-ones at room temperature in water.

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20

Dobiaš, Juraj, Marek Ondruš, Gabriela Addová, and Andrej Boháč. "Switchable highly regioselective synthesis of 3,4-dihydroquinoxalin-2(1H)ones from o-phenylenediamines and aroylpyruvates." Beilstein Journal of Organic Chemistry 13 (July 10, 2017): 1350–60. http://dx.doi.org/10.3762/bjoc.13.132.

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3-Acylmethylidene-3,4-dihydroquinoxalin-2(1H)-ones are compounds which possess a wide range of physical and pharmaceutical applications. These compounds can be easily prepared by cyclocondensation of o-phenylenediamines and aroylpyruvates. Unsymmetrically substituted o-phenylenediamines can be obtained form regioisomeric mixtures of 3,4-dihydroquinoxalin-2(1H)-ones. It is often quite difficult to get a pure regioisomer and determine its structure without controlling the reaction selectivity and exploitation of complex NMR techniques (HSQC, NOESY, HMBC). This article examines the regioselectivi

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21

Khomenko, Dmytro, Roman Doroschuk, and Rostyslav Lampeka. "Efficient Synthesis Of 5-Substituted Ethyl 1,2,4-Triazole-3-Carboxylates." French-Ukrainian Journal of Chemistry 4, no. 2 (2016): 28–32. http://dx.doi.org/10.17721/fujcv4i2p28-32.

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Easily accessible carboxylic acid hydrazides undergo cyclocondensation with ethyl carbethoxyformimidate, giving 5-substituted ethyl 1,2,4-triazole-3-carboxylates. These are important building blocks in organic synthesis. The approach we used to obtain title compounds made possible synthesis of 3-(2-aminophenyl)-1,2,4-triazole.

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22

Nosova, Emiliya V., Olga A. Batanova, Nataliya N. Mochulskaya, and Galina N. Lipunova. "Synthetic approaches to 2-aryl/hetaryl- and 2-(hetaryl)ylidene derivatives of fluorinated 1,3-benzothiazin-4-ones." Chimica Techno Acta 7, no. 3 (2020): 96–103. http://dx.doi.org/10.15826/chimtech.2020.7.3.01.

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A series of 2-hetaryl- and 2-(hetaryl)ylidene substituted 5-fluoro-8-nitro-1,3-benzothiazin-4-ones was synthesized by interaction of 2,6-difluoro-3-nitrobenzoylisothiocyanate with C-nucleophiles. Cyclocondensation of polyfluorobenzoylchlorides with aryl and hetaryl thioamides represents new approach to 1,3-benzothiazin-4-ones. Some compounds proved to be promising for further development of tuberculostatic agents.

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23

Vats, Vishnu, R. K. Upadhyay, and Prathibha Sharma. "Synthesis and Antifungal Activity of 2-Ketophenyl-3-substituted aryl-1-thiazolidin-4-ones." E-Journal of Chemistry 7, no. 3 (2010): 1040–44. http://dx.doi.org/10.1155/2010/979353.

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A new series of 2-ketophenyl-3-substituted aryl-1- thiazolidin-4-ones were synthesized by cyclocondensation of ketoazomethines and thioglycolic acid. Ketoazomethines were synthesized by condensation of phenyl glyoxal (prepared by partial oxidation of acetophenone) and variouspara-substituted anilines. Their structures were elucidated by elemental analysis, IR and H1NMR; they were screened for their antifungal activity against hazardous fungi namelyFusarium Oxysporum, Pythium, SclerotiumandAlternaria brassicola.

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24

Patel, M. C., and Dhameliya. "Synthesis and Biological Activity of (Z) –n-(5-Benzylidene-4-oxo-2-substituted- phenylthiazolidin-3-yl)-5-((1, 3-dioxoisoindolin-2-yl)methyl)-2-hydroxybenzamide." E-Journal of Chemistry 7, no. 4 (2010): 1484–90. http://dx.doi.org/10.1155/2010/586984.

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5-((1, 3-Dioxoisoindolin-2-yl)methyl-2-hydroxybenzohydrazide (1) undergoes facile condensation with aromatic aldehydes to afford the correspondingN'-substituted-phenyl-5-((1,3-dioxoisoindolin-2-yl) methyl)-2-hydroxybenzohydrazide (2a-h) in good yields. Cyclocondensation of compounds (2a-h) with thioglycolic acid yields 5-((1,3-dioxoisoindolin-2-yl) methyl)-2-hydroxy-N-(4-oxo-2-substituted phenylthiazolidin-3-yl)benzamide (3a-h). These (3a-h) compounds were further reacted with benzaldehyde in the presence of sodium ethanolate affords, (Z) –N-(5-benzylidene-4-oxo-2-substituted phenyl-thiazolidi

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25

Knieß, Astrid, Margit Gruner та Roland Mayer. "Reaktionsverhalten von β-Oxo-carbonsäurederivaten der Anthracenreihe bei der Synthese von Pyrazolen / On the Reaction Behavior of ß-Oxo Carbonic Acid Derivatives of the Anthracene Series in Pyrazole Synthesis". Zeitschrift für Naturforschung B 54, № 9 (1999): 1133–37. http://dx.doi.org/10.1515/znb-1999-0908.

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ß-Oxo-1 and 9-anthracenepropionate (6 and 7) reacts with DMF-acetale to enaminones 10 and 11. The reaction of 2-(dimethylamino)methylen-substituted ß-oxo-1 -anthracenepropionate (10) with hydrazines yields 5-(l-anthracenyl)-pyrazol-4-carboxylates (13). In contrast, the cyclocondensation of 3-(9-anthracenyl)-2-(dimethylamino)methylen-3-oxo-propionate (11) with hydrazine hydrochlorides gives 4-(9-anthracenoyl)-5-hydroxy-pyrazoles (14). This is caused by the sterical hindrance of the carbonyl group of the anthracene derivatives in position 9; thus, the cyclocondensation proceeds via reaction of t

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26

Semichenko, E. S., E. V. Root, L. M. Pokrovskii, and G. A. Suboch. "Cyclocondensation of 1H-indol-2-amine with pentane-2,3,4-trione 3-arylhydrazones." Russian Journal of Organic Chemistry 43, no. 3 (2007): 406–8. http://dx.doi.org/10.1134/s1070428007030128.

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27

Deeb, Ali, Abdel Naby Essawy, Fathy Yasine, and Rida Fikry. "Pyridazine Derivatives and Related Compounds, Part 3 [1] Some Reactions with 4-Cyano-3(2H)-pyridazinethione." Zeitschrift für Naturforschung B 46, no. 6 (1991): 835. http://dx.doi.org/10.1515/znb-1991-0620.

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The reaction of 5-amino-3,4-diphenylthieno[2,3-c]pyridazine-6-carboxamide 2 with formamide, acetic anhydride and carbon disulphide yielded pyrimido[4′,5′ :4,5]thieno[2,3-c]-pyridazin-4-one derivatives. Pyrimido[4,5-c]pyridazinethione and dithione derivatives were obtained by cyclocondensation of 3-amino-5,6-diphenylpyridazine-4-carbonitrile (8) with phenyl isothiocyanate and carbon disulphide, respectively. Tetrahydropyridazino[3,4-b]-quinoline (11) was prepared by reaction of 8 with cyclohexanone in presence of zinc chloride.

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28

Sokolov, V. B., A. Yu Aksinenko, T. A. Epishina, T. V. Goreva, A. N. Pushin, and I. V. Martynov. "Acylimines of hexafluoroacetone and methyl trifluoropyruvate in cyclocondensation with 2-aminothiazolines." Russian Chemical Bulletin 54, no. 7 (2005): 1667–71. http://dx.doi.org/10.1007/s11172-006-0019-3.

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29

Begum, Kahkashan. "Synthesis and Evaluation of Some 2–Aryl–3–[Substituted Pyridin–2–Yl]-Amino/Methylamino Thiazolidin-4-Ones." Oriental Journal of Chemistry 34, no. 6 (2018): 3052–57. http://dx.doi.org/10.13005/ojc/340647.

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A series of compounds incorporating thiazolidinone moiety has been synthesized and screened for their antifungal activity. 2-Aryl-3-[substituted pyridin-2-yl]-amino/methylamino thiazolidin-4-ones have been synthesized by cyclocondensation of [substituted pyridin-2-yl]- araldehydehydrazone and N-Methyl [substituted pyridin-2-yl]-araldehydehydrazone with mercapto acetic acid in dioxane. The initial reactants required for the synthesis were obtained by refluxing 2-hydrazino substituted pyridine and 2-[N-methylhydrazino]-substituted pyridine with different substituted aldehydes. These newly synthe

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30

Panchasara, Dinesh R., and Subhash Pande. "Synthesis and Biological Activity of 3-Chloro-1-(4-perimidine methylcarbonylamino)-4-phenyl-azetidin-2-one." E-Journal of Chemistry 6, s1 (2009): S91—S96. http://dx.doi.org/10.1155/2009/457168.

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Perimidine-1-acetic acid hydrazide (1) undergoes facile condensation with aromatic aldehydes to afford the corresponding azomethine (i.e. Schiff base) derivatives (2a-h) in good yield. Cyclocondensation of compounds (2a-h) with chloro acetyl chloride affords 3-chloro-1-(4-perimidine methylcarbonylamino)-4-phenyl-azetidin-2-ones (3a-h). The structures of these compounds were established on the basis of analytical and spectral data. The newly synthesized compounds were evaluated for their antibacterial and antifungal activities.

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31

Smit, Biljana, Radoslav Pavlovic, Ana Radosavljevic-Mihailovic, et al. "Synthesis, characterization and cytotoxicity of palladium(II) complex of 3-[(2-hydroxy-benzylidene)-amino]-2-thioxo-imidazolidin-4-one." Journal of the Serbian Chemical Society 78, no. 2 (2013): 217–27. http://dx.doi.org/10.2298/jsc120725154s.

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The polydentate ligand, 3-[(2-hydroxy-benzylidene)-amino]-2-thioxo-imidazolidin-4-one, was synthesized by intermolecular cyclocondensation reaction of 2-hydroxybenzaldehyde thiosemicarbazone and ethylchloroacetate. Novel palladium(II) complex was obtained by nucleophilic substitution of both DMSO ligands from cis-[Pd(DMSO)2Cl2] with iminic nitrogen and thiolactamic sulfur from ligand. The structure of compounds was characterized on the basis of their spectral data. The cytotoxic activity of the ligand and palladium(II) complex was studied on tumor cell lines: human colon carcinoma HCT-116 and

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32

Štetinová, Jarmila, Martina Lojkásková, Miloslava Dandárová, Ján Leško, and Rudolf Kada. "Reactions of Substituted 5-Nitro-3-furoylthioureas." Collection of Czechoslovak Chemical Communications 61, no. 2 (1996): 305–12. http://dx.doi.org/10.1135/cccc19960305.

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Some cyclization and cyclocondensation reactions of 1-(5-nitro-3-furoyl)-3-(4-R-phenyl)thioureas 1a-1e (R = H, CH3, N(C2H5)2, Br, CN) were conducted. 6-R-2-(5-Nitro-3-furoylamino)benzothiazoles 2a-2c (R = H, CH3, Br) were obtained by bromine-induced cyclization of the corresponding thioureas. Reacted with bromoacetone and ω-bromoacetophenone, respectively, the derivatives 1a-1e gave 2-(4-R-phenylimino)-3-(5-nitro-3-furoyl)-4-R1-4-thiazolines 3a-3e (R = H, CH3, N(C2H5)2, Br, CN; R1 = CH3) and 3f-3j (R = H, CH3, N(C2H5)2, Br, CN; R1 = C6H5), respectively. The structure of the compounds synthesiz

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33

Giurg, Mirosław, Katarzyna Piekielska, Magdalena Gębala, et al. "Catalytic Oxidative Cyclocondensation of o‐Aminophenols to 2‐Amino‐3H‐phenoxazin‐3‐ones." Synthetic Communications 37, no. 11 (2007): 1779–89. http://dx.doi.org/10.1080/00397910701316136.

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34

NEMES, P., M. KAJTAR-PEREDY, and P. SCHEIBER. "ChemInform Abstract: Synthesis of Dihydropyrrolo(2,1-a)isoquinolines by Regioselective (3 + 2) Cyclocondensation." ChemInform 27, no. 49 (2010): no. http://dx.doi.org/10.1002/chin.199649168.

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35

Liu, Kang-Chien, Bi-Jane Shih, and Ming-Kuan Hu. "Cyclocondensation of 3-amino-2-iminonaphtho[1,2-d]thiazole with oxalic acid derivatives." Journal of Heterocyclic Chemistry 24, no. 6 (1987): 1729–32. http://dx.doi.org/10.1002/jhet.5570240644.

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36

Mohan, Billava J., Balladka K. Sarojini, Hemmige S. Yathirajan, Ravindranath Rathore, and Christopher Glidewell. "Crystal structure of ethyl (1RS,6SR)-4-(2-methyl-1H-imidazol-4-yl)-2-oxo-6-(2,3,5-trichlorophenyl)cyclohex-3-ene-1-carboxylate." Acta Crystallographica Section E Crystallographic Communications 72, no. 1 (2016): 31–34. http://dx.doi.org/10.1107/s2056989015023245.

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The title compound, C19H17Cl3N2O3, has been prepared in a cyclocondensation reaction between 2,3,5-trichlorobenzaldehye and 4-acetyl-2-methyl-1H-imidazole. The cyclohexenone ring adopts an envelope conformation with the C atom substituted by the trichlorophenyl ring as the flap. The mutuallytransester and aryl substituents both occupy equatorial sites. In the crystal, a combination of N—H...O and C—H...N hydrogen bonds links the molecules into ribbons of edge-fused centrosymmetric rings, which encloseR22(14) andR44(16) alternate ring motifs, propagating along theb-axis direction.

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37

Jubie, Selvaraj, Rajamanickam Gayathri, and Rajagopal Kalirajan. "Synthesis and Neuropharmacological Evaluation of Some Novel Quinoxaline 2, 3-Dione Derivatives." Scientific World Journal 2012 (2012): 1–8. http://dx.doi.org/10.1100/2012/718023.

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Quinoxaline-2, 3-dione obtained from cyclocondensation reaction of o-phenylene diamine with oxalic acid was reacted with three different ketones and formaldehyde to give the corresponding Mannich bases in satisfactory yield. Their structures were confirmed by using1H NMR, IR, and mass analysis. In pharmacological evaluation, the synthesized compounds showed its curative effect against ethidium-bromide-induced demyelination in rats. For the purpose, different screening methods such as open field exploratory behavior test, rota rod test, grip strength test, beam walk test, and photo actometer te

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38

Washington, Courtney, Jamere Maxwell, Joenathan Stevenson, et al. "Mechanistic studies of the tyrosinase-catalyzed oxidative cyclocondensation of 2-aminophenol to 2-aminophenoxazin-3-one." Archives of Biochemistry and Biophysics 577-578 (July 2015): 24–34. http://dx.doi.org/10.1016/j.abb.2015.04.007.

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39

Kasimogullari, Rahmi, Belma Zengin, Makbule Maden, Samet Mert, and Cavit Kazaz. "Synthesis of new derivatives of 1-(3-amino-phenyl)-4- benzoyl-5-phenyl-1h-pyrazole-3-carboxylic acid." Journal of the Serbian Chemical Society 75, no. 12 (2010): 1625–35. http://dx.doi.org/10.2298/jsc101018135k.

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4-Benzoyl-1-(3-aminophenyl)-5-phenyl-1H-pyrazole-3- carboxylic acid (1) was synthesized according to the literature.1 2-(3- Aminophenyl)-3,4-diphenyl-2H-pyrazolo[3,4-d]pyridazin-7(6H)-one (5) was obtained by the cyclocondensation reaction of 1 with hydrazine hydrate. New pyrazole derivatives of compounds 1 and 5 were synthesized by their reaction with ?-diketones, ?-ketoesters, ?-naphthol, phenol and various other reagents. The structures of the synthesized compounds were characterized by 1H-NMR, 13C-NMR, IR and Mass spectroscopy, as well as elemental analysis.

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40

Čupka, Pavol, Juraj Bella, and Augustin Martvoň. "Synthesis and spectral properties of substituted 1,4-dihydropyridines and 1,4,5,6,7,8-hexahydroquinolines." Collection of Czechoslovak Chemical Communications 52, no. 3 (1987): 742–51. http://dx.doi.org/10.1135/cccc19870742.

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Cyclocondensation of 5-nitrophenyl-2-furaldehydes or 5-nitrophenyl-2-thiophenecarbaldehydes with acetoacetates and ammonia in organic solvents afforded 1,4-dihydropyridine derivatives, with 3-aminocrotonates and dimedone the former yielded 1,4,5,6,7,8-hexahydroquinoline derivatives. Relation between the structure and spectral properties is discussed.

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41

Hakobyan, R. M., S. S. Hayotsyan, and G. S. Melikyan. "Cyclocondensation of 3-acetylfuran-2(5H)-ones with benzylidenemalononitrile. Synthesis of 3-(5-amino-4,6-dicyanobiphenyl-3-yl)furan-2(5H)-ones." Russian Journal of Organic Chemistry 51, no. 12 (2015): 1809–12. http://dx.doi.org/10.1134/s1070428015120313.

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42

Gašparová, Renata, Pavol Koiš, Margita Lácová, Silvia Kováčová, and Andrej Boháč. "Synthesis, reactions and antineoplastic activity of 3-(2-oxo-2H-chromen-3-yl)-2-oxo-2H,5H-pyrano[3,2-c]chromene derivatives." Open Chemistry 11, no. 4 (2013): 502–13. http://dx.doi.org/10.2478/s11532-012-0184-1.

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AbstractThe key 3-(2-oxo-2H-chromen-3-yl)-2-oxo-2H,5H-pyrano[3,2-c]chromen-5-yl acetates 3 were synthesized in high yields by cyclocondensation of 4-oxo-4H-chromen-3-carbaldehydes 1 with coumarin-3-acetic acids 2 under mild conditions. The reaction pathway involves aldol condensation and subsequent intramolecular lactonization to afford 2-oxo-2H,5H-pyrano[3,2-c]chromene skeleton 3. Further treatment of acetates 3 with alcohols, water or nitrogen containing compounds led to 5-alkoxy-, 5-hydroxy- or 5-acylamino-2H,5H-pyrano[3,2-c]chromen-2-ones 4-6 via nucleophilic substitution of acetyloxy grou

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43

Chaban, Taras, Volodymyr Ogurtsov, Ihor Chaban, Iryna Myrko, Stefan Harkov, and Maryan Lelyukh. "Synthesis of some new 4-iminothiazolidine-2-ones as possible antioxidants agents." Pharmacia 66, no. 1 (2019): 27–32. http://dx.doi.org/10.3897/pharmacia.66.e35131.

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Novel N3 substituted derivatives of 4-iminothiazolidine-2-one were synthesised under the reactions of [2+3]cyclocondensation, thionation and aminolysis. The functionalisation of 3-phenyl-4-imino-thiazolydine-2-one was carried out in its C5 position under condensation Knoevenagel and nitrosation reactions. The antioxidant activity of the synthesised compounds was evaluated in vitro by the method of their scavenging effect on 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals. When compared with existing antioxidants, some of our compounds were found to be more potent.

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Sokolov, V. B., A. Yu Aksinenko, and I. V. Martynov. "Cyclocondensation of methyl 2-(5-methylisoxazol-3-yl)imino-3,3,3-trifluoropropionate with 1,3-binucleophiles." Russian Journal of General Chemistry 84, no. 1 (2014): 86–88. http://dx.doi.org/10.1134/s1070363214010137.

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45

Ortega, Alesandere, Uxue Uria, Tomás Tejero, et al. "Brønsted Acid Catalyzed (4 + 2) Cyclocondensation of 3-Substituted Indoles with Donor–Acceptor Cyclopropanes." Organic Letters 23, no. 6 (2021): 2326–31. http://dx.doi.org/10.1021/acs.orglett.1c00470.

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46

Gulyakevich, O. V., P. V. Kurman, A. S. Lyakhov, and A. L. Mikhal’chuk. "3-Acetyl-4-methylpyrido[2,1-a]-isoquinolin-2-ones. [2+4] cyclocondensation of 3,4-dihydroisoquinolines with triacetylmethane." Chemistry of Heterocyclic Compounds 42, no. 1 (2006): 70–76. http://dx.doi.org/10.1007/s10593-006-0049-7.

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47

GEFFKEN, D., and J. FROBOESE. "ChemInform Abstract: Unexpected Cyclocondensation of N-Benzyloxy-2-(4-fluorophenyl)-2-vinyl- glycolamide to 1-Benzyloxy-3-(4-fluorophenyl)-3-pyrrolin-2-one." ChemInform 28, no. 1 (2010): no. http://dx.doi.org/10.1002/chin.199701135.

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48

Akbarzadeh, Marzieh, Mehdi Bakavoli, Hossein Eshghi, and Ali Shiri. "Synthesis of Novel Derivatives of (Benz)Imidazo[2,1-b]Pyrimido[4,5-d][1,3]Thiazine." Journal of Chemical Research 41, no. 12 (2017): 730–33. http://dx.doi.org/10.3184/174751917x15132496997778.

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Several derivatives of the novel heterocyclic systems 2-substituted-imidazo- and benzimidazo-[2,1- b]pyrimido[4,5- d][1,3]thiazine have been synthesised through the one-pot cyclocondensation of 2,4-dichloro-5-(chloromethyl)-6-methylpyrimidine with imidazolidine-2-thione and 1 H-benzimidazole-2(3 H)-thione and subsequently substituted by various secondary amines in moderately good yields.

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49

Dzurilla, Milan, Martin Ružinský, Peter Kutschy, Jalpa P. Tewari, and Vladimír Kováčik. "Application of 2-Substituted Ethyl Isothiocyanates and 2-Aminothiols in the Synthesis of the Analogs of Indole Phytoalexin Camalexin." Collection of Czechoslovak Chemical Communications 64, no. 9 (1999): 1448–56. http://dx.doi.org/10.1135/cccc19991448.

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Treatment of (indol-1-yl)magnesium bromide or iodide with 2-bromoethyl isothiocyanate afforded 1-(4,5-dihydrothiazol-2-yl)indole (6). Analogous reaction with 2,2-dimethoxyethyl isothiocyanate led to corresponding 1-thiocarbamoylindole derivative (7), which was cyclized to 1-(5-methoxy-4,5-dihydrothiazol-2-yl)indole (8) by treatment with boron trifluoride etherate. New analogs of camalexin, namely 4',5'-dihydrocamalexin (12) and benzocamalexin (14) were prepared by cyclocondensation reaction of 1-(tert-butoxycarbonyl)indole-3-carbaldehyde with cysteamine and 2-aminobenzenethiol. Antifungal acti

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50

Sweidan, Nuha I., Mustafa M. El-Abadelah, Musa Z. Nazer та Wolfgang Voelter. "Selective cyclization modes of methyl 3′-heteroarylamino-2′-(2,5-dichlorothiophene-3-carbonyl)acrylates. Synthesis of model (thienyl)pyrazolo- and triazolo[1,5-α]pyrimidines". Zeitschrift für Naturforschung B 75, № 12 (2020): 1037–42. http://dx.doi.org/10.1515/znb-2020-0128.

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AbstractInteraction of methyl 3-ethoxy-2-(2,5-dichloro-3-thenoyl)acrylate (I) with 3-aminopyrazole and 3-amino-1,2,4-triazole generated the respective pyrazolo[1,5-α]pyrimidine (4) and triazolo[1,5-α]pyrimidine (7). The formation of 4 entails selective and consecutive displacement of the 3-ethoxy and methoxy (ester) anions in I by 3-NH2 and 1-NH of 3-aminopyrazole. On the other hand, the formation of 7 implies selective displacement of 3-ethoxy in I by the ring-NH followed by cyclocondensation involving the keto group in I and 3-NH2 of aminotriazole. This latter selective displacement sequence

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