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Journal articles on the topic 'Oxazines and substituted aldehydes'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

D.T., Biradar, and M. B. Swami Dr. "Synthesis of Schiff's Bases from 2-Amino-4H-1, 3-Oxazine / Thiazine and Substituted Aldehydes and their Transition Metal Complexes." International Journal of Current Science Research and Review 04, no. 07 (2021): 677–83. https://doi.org/10.47191/ijcsrr/V4-i7-09.

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Abstract : Objective: Many methods can be found in literature for the synthesis a Oxazines and Thiazines. Few are reported for one-pot multi component cyclo-condensation of an alkayane urea / Thiourea and Aldehyde to 2- amino-4H-1, 3-Oxazines or Thiazines. Different catalysts are reported like Trifluoro-acetic acid, glacial acetic acid under reflux condition Mandal and Co-workers have utilized perchloric acid (HClO4) supported on silica gel as catalyst under solvent free condition ytterbium trifluorate [Yb(OTF)3] plays role of Lewis acid. It is also used in several Diel’s-Alder cyclo-add

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2

Sheng, Jinyu, Xiang Su, Chengyao Cao, and Chao Chen. "Synthesis of benzo[1,3]oxazines via copper(i)-catalyzed cascade annulation of nitriles, aldehydes and diaryliodonium salts." Organic Chemistry Frontiers 3, no. 4 (2016): 501–4. http://dx.doi.org/10.1039/c6qo00012f.

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A copper(i)-catalyzed one-pot [2 + 2 + 2] cascade annulation reaction of diaryliodoniums, nitriles, and aldehydes has been developed for the efficient synthesis of 2,4-substituted benzoxazine derivatives.

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3

Háznagy, Márton Benedek, Antal Csámpai, Imre Ugrai, Barnabás Molnár, Matti Haukka, and Zsolt Szakonyi. "Stereoselective Synthesis and Catalytical Application of Perillaldehyde-Based 3-Amino-1,2-diol Regioisomers." International Journal of Molecular Sciences 25, no. 8 (2024): 4325. http://dx.doi.org/10.3390/ijms25084325.

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A library of regioisomeric monoterpene-based aminodiols was synthesised and applied as chiral catalysts in the addition of diethylzinc to benzaldehyde. The synthesis of the first type of aminodiols was achieved starting from (−)-8,9-dihydroperillaldehyde via reductive amination, followed by Boc protection and dihydroxylation with the OsO4/NMO system. Separation of formed stereoisomers resulted in a library of aminodiol diastereoisomers. The library of regioisomeric analogues was obtained starting from (−)-8,9-dihydroperillic alcohol, which was transformed into a mixture of allylic trichloroace

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4

Karade, Nandkishor, Girdharilal Tiwari, and Sumit Gampawar. "Efficient Oxidative Conversion of Aldehydes to 2-Substituted Oxazolines and Oxazines Using (Diacetoxyiodo)benzene." Synlett 2007, no. 12 (2007): 1921–24. http://dx.doi.org/10.1055/s-2007-982571.

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5

Devi, Kalpana, and Monica Kachroo. "Synthesis and Docking Studies of Oxazine Derivatives as Anti-inflammatory and Antioxidant Agents." DER PHARMA CHEMICA 13, no. 3 (2021): 9. https://doi.org/10.5281/zenodo.11070994.

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A new series of N-(4-{4-(substituted phenyl)-2-[(4-fluro-benzylidene)-amino]-6H-[1,3] oxazine-6-yl}-phenyl)-isonicotiamide were synthesized by reaction of p-amino acetophenone with isonicotinyl chloride to obtain the secondary amides. ClaisenSchmidth condensation reaction with substituted aldehydes led to the formation of corresponding chalcones. These chalcones were cyclized with urea to form oxazine which further reacted with p-fluorobenzaldehyde to form the corresponding Schiff’s bases. All the synthesized compounds were characterized by IR and 1HNMR spectral data, mass spectra and el

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6

Devi, Kalpana, and Monica Kachroo. "Synthesis and Docking Studies of Oxazine Derivatives as Anti-inflammatory and Antioxidant Agents." Der Pharma Chemica 13, no. 3 (2021): 9. https://doi.org/10.5281/zenodo.14722735.

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A new series of N-(4-{4-(substituted phenyl)-2-[(4-fluro-benzylidene)-amino]-6H-[1,3] oxazine-6-yl}-phenyl)-isonicotiamide were synthesized by reaction of p-amino acetophenone with isonicotinyl chloride to obtain the secondary amides. ClaisenSchmidth condensation reaction with substituted aldehydes led to the formation of corresponding chalcones. These chalcones were cyclized with urea to form oxazine which further reacted with p-fluorobenzaldehyde to form the corresponding Schiff’s bases. All the synthesized compounds were characterized by IR and 1HNMR spectral data, mass spectra and el

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7

Yasui, Yusuke, Kento Ogata, Itaru Sato та Yujiro Hayashi. "Asymmetric Aldol Reaction of α-Acetoxyimino Aldehydes and its Application in the Synthesis of Substituted 1,2-Oxazine Derivatives". Advanced Synthesis & Catalysis 356, № 14-15 (2014): 3106–18. http://dx.doi.org/10.1002/adsc.201400294.

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8

Yasui, Yusuke, Kento Ogata, Itaru Sato та Yujiro Hayashi. "ChemInform Abstract: Asymmetric Aldol Reaction of α-Acetoxyimino Aldehydes and Its Application in the Synthesis of Substituted 1,2-Oxazine Derivatives." ChemInform 46, № 13 (2015): no. http://dx.doi.org/10.1002/chin.201513253.

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9

Peter, Clovis, Philippe Geoffroy, and Michel Miesch. "Highly diastereoselective access to polyfunctionalized 1,3-oxazines promoted by Brønsted/Lewis acids." Organic Chemistry Frontiers 5, no. 4 (2018): 566–70. http://dx.doi.org/10.1039/c7qo00891k.

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The Brønsted/Lewis acid catalyzed reaction of α-alkyloxyamides tethered to α,β-unsaturated ketones (aldehydes) afforded exclusively polyfunctionalized 1,3-oxazines with high diastereoselectivities and in high yields.

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10

Belz, Tyson, Saleh Ihmaid, Jasim Al-Rawi, and Steve Petrovski. "Synthesis Characterization and Antibacterial, Antifungal Activity of N-(Benzyl Carbamoyl or Carbamothioyl)-2-hydroxy Substituted Benzamide and 2-Benzyl Amino-Substituted Benzoxazines." International Journal of Medicinal Chemistry 2013 (October 31, 2013): 1–20. http://dx.doi.org/10.1155/2013/436397.

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New N-(benzyl carbamothioyl)-2-hydroxy substituted benzamides 13, 20, and 21 were synthesized using sodium bicarbonate and benzyl amine with 2-thioxo-substituted-1,3-benzoxazines 6, 10a, b, 11c, and 12a–n. The 2-thioxo-substituted-1,3-oxazines 6, 10a-b, 11d 12a–n, and 26 were converted to the corresponding 2-methylthio-substituted-1,3-oxazines 14a–l and 24 which were then converted to 2-benzyl amino-substituted-benzoxazines 15a–i by refluxing with benzylamine. Products 15a, b, e, f, and g were also synthesized by boiling the corresponding N-(benzyl carbamothioyl)-2-hydroxy substituted benzamid

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11

Thirunarayanan, Ganesamoorthy, V. Renuka, K. G. Sekar, K. Lakshmanan, and K. Anbarasu. "Insect Antifeedant Potent Unsaturated 1,3-Oxazine-2-Amines." International Letters of Chemistry, Physics and Astronomy 23 (November 2013): 66–81. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.23.66.

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Insect antifeedant activities of some halo substituted aryl 1,3-oxazine-2-amines have been measured using 4th instar larvae Achoea janata L by castor leaf discs-Dethler’s method. The highly halo substituted oxazine amines have shown good insect antifeedant activities. The 1,3-oxazine amines have been synthesised by greener method by solvent-free cyclization of aryl enones with urea under microwave irradiation. The yields of the oxazines were more than 80%. The synthesised oxazines were characterized by their physical constants, analytical and spectroscopic data.

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12

Thirunarayanan, Ganesamoorthy, V. Renuka, K. G. Sekar, K. Lakshmanan, and K. Anbarasu. "Insect Antifeedant Potent Unsaturated 1,3-Oxazine-2-Amines." International Letters of Chemistry, Physics and Astronomy 23 (November 30, 2013): 66–81. http://dx.doi.org/10.56431/p-imt1p4.

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Insect antifeedant activities of some halo substituted aryl 1,3-oxazine-2-amines have been measured using 4th instar larvae Achoea janata L by castor leaf discs-Dethler’s method. The highly halo substituted oxazine amines have shown good insect antifeedant activities. The 1,3-oxazine amines have been synthesised by greener method by solvent-free cyclization of aryl enones with urea under microwave irradiation. The yields of the oxazines were more than 80%. The synthesised oxazines were characterized by their physical constants, analytical and spectroscopic data.

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13

Vorbrüggen, Helmut, та Konrad Krolikiewicz. "A simple synthesis of Δ2-oxazines, Δ2-oxazines, Δ2-thiazolines and 2-substituted benzoxazoles". Tetrahedron 49, № 41 (1993): 9353–72. http://dx.doi.org/10.1016/0040-4020(93)80021-k.

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14

Hammouda, M., Z. M. Abou Zeid, and M. A. Metwally. "Synthesis of novel functionally substituted pyridazines and oxazines." Chemistry of Heterocyclic Compounds 44, no. 8 (2008): 985–90. http://dx.doi.org/10.1007/s10593-008-0141-2.

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15

Burger, Klaus, Norbert Sewald, Erasmus Huber, and Ralph Ottlinger. "Reaktionen 4,4-Bis(trifluormethyl)-substituierter Heterodiene mit Alkinen / Reactions of 4,4-Bis(trifluoromethyl) Substituted Heterodienes with Alkynes." Zeitschrift für Naturforschung B 44, no. 10 (1989): 1298–312. http://dx.doi.org/10.1515/znb-1989-1026.

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4,4-Bis(trifluoromethyl) substituted 1-oxa-3-azabuta-1,3-dienes (1) and alkynes react to give open-chain trifluoromethyl substituted N-propargylic amides (4), 4H-1,3-oxazines (5) and 2-oxazolines (6, 7), respectively. The selectivity of the reaction can be controlled effectively by the reaction conditions used.

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16

Medvecký, Michal, Igor Linder, Luise Schefzig, Hans-Ulrich Reissig, and Reinhold Zimmer. "Iodination of carbohydrate-derived 1,2-oxazines to enantiopure 5-iodo-3,6-dihydro-2H-1,2-oxazines and subsequent palladium-catalyzed cross-coupling reactions." Beilstein Journal of Organic Chemistry 12 (December 29, 2016): 2898–905. http://dx.doi.org/10.3762/bjoc.12.289.

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Iodination of carbohydrate-derived 3,6-dihydro-2H-1,2-oxazines of type 3 using iodine and pyridine in DMF furnished 5-iodo-substituted 1,2-oxazine derivatives 4 with high efficacy. The alkenyl iodide moiety of 1,2-oxazine derivatives syn-4 and anti-4 was subsequently exploited for the introduction of new functionalities at the C-5 position by applying palladium-catalyzed carbon–carbon bond-forming reactions such as Sonogashira, Heck, or Suzuki coupling reactions as well as a cyanation reaction. These cross-coupling reactions led to a series of 5-alkynyl-, 5-alkenyl-, 5-aryl- and 5-cyano-substi

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17

Lindsay-Scott, Peter J., and Eloise Rivlin-Derrick. "Regiocontrolled Synthesis of 6,7-Dihydro-4H-pyrazolo[5,1-c][1,4]oxazines." Synthesis 52, no. 01 (2019): 105–18. http://dx.doi.org/10.1055/s-0037-1610734.

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Synthetic access to 6,7-dihydro-4H-pyrazolo[5,1-c][1,4]oxazines has been achieved in 3–4 steps from commercially available pyrazoles. Optimization of a protected hydroxyethyl group on N1 enabled the regiocontrolled construction of pyrazole-5-aldehydes in high yields; subsequent deprotection and reduction generated fused heterocyclic scaffolds bearing multiple substitution patterns. Moreover, the intermediate pyrazole lactols were shown to be versatile synthetic building blocks.

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18

Cwik, Agnieszka, Zoltán Hell, Adrienn Hegedüs, Zoltán Finta, and Zoltán Horváth. "A simple synthesis of 2-substituted oxazolines and oxazines." Tetrahedron Letters 43, no. 22 (2002): 3985–87. http://dx.doi.org/10.1016/s0040-4039(02)00723-2.

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19

Zimmer, Reinhold, and Hans-Ulrich Reissig. "Lithiated 3-trifluoromethyl-substituted 1,2-oxazines and their reactions." Journal of Fluorine Chemistry 80, no. 1 (1996): 21–26. http://dx.doi.org/10.1016/s0022-1139(96)03454-9.

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20

Tolchinskii, S. E., M. V. Kormer, and I. A. Maretina. "Synthesis of 2-substituted naphth[1,8-de]-1,3-oxazines." Chemistry of Heterocyclic Compounds 27, no. 4 (1991): 424–25. http://dx.doi.org/10.1007/bf00480843.

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21

Katritzky, Alan R., Irina V. Shcherbakova, Balbino Mancheño, and Robert D. Tack. "Conformational analysis of substituted 5,6-dihydro-4H-1,3-oxazines." Magnetic Resonance in Chemistry 31, no. 7 (1993): 615–20. http://dx.doi.org/10.1002/mrc.1260310702.

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22

Khlebnikov, Alexander F., Mikhail S. Novikov, Yelizaveta G. Gorbunova, et al. "Isoxazolium N-ylides and 1-oxa-5-azahexa-1,3,5-trienes on the way from isoxazoles to 2H-1,3-oxazines." Beilstein Journal of Organic Chemistry 10 (August 14, 2014): 1896–905. http://dx.doi.org/10.3762/bjoc.10.197.

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Theoretical and experimental studies of the reaction of isoxazoles with diazo compounds show that the formation of 2H-1,3-oxazines proceeds via the formation of (3Z)-1-oxa-5-azahexa-1,3,5-trienes which undergo a 6π-cyclization. The stationary points corresponding to the probable reaction intermediates, isoxazolium N-ylides, were located by DFT calculations at the B3LYP/6-31G(d) level only for derivatives without a substituent in position 3 of the isoxazole ring. These isoxazolium N-ylides are thermodynamically and kinetically very unstable. According to the calculations and experimental result

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23

Volkova, Darya S., Arkadiy A. Popov, Evgeny V. Root, Alexey A. Kukushkin, and George A. Suboch. "SUBSTITUTED 4-NITROSOPYRAZOLES IN THE DIELS-ALDER REACTION." Siberian Journal of Life Sciences and Agriculture 13, no. 5 (2021): 104–19. http://dx.doi.org/10.12731/2658-6649-2021-13-5-104-119.

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Background. 4-Nitrosopyrazoles have become widespread in the pharmaceutical industry and in chemistry due to their high reactivity and biological activity. However, the interaction of 3,5-substituted 4-nitroso-1H-pyrazoles with diene hydrocarbons has not been studied to date. Purpose. Study of diene condensation of tetraphenylcyclopentadienone with 3,5-dimethyl-4-nitroso-1H-pyrazole and 3(5)-methyl-4-nitroso-5(3)-phenyl-1H-pyrazole; proof of the structure of the obtained compounds; prediction of potential positive biological activity. Materials and methods. Research methods include

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24

Fülöp, Ferenc, Kalevi Pihlaja, Gábor Bernáth, Lukman Makmur, and Rolf Norrestam. "A Simple Synthesis of Condensed N-Methyl-Substituted 1,3-Oxazines." Acta Chemica Scandinavica 41b (1987): 147–49. http://dx.doi.org/10.3891/acta.chem.scand.41b-0147.

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25

Tinant, B., and J. P. Declercq. "Structure of N-substituted 1,2-oxazines. II. Bicyclic bridged derivatives." Acta Crystallographica Section C Crystal Structure Communications 47, no. 6 (1991): 1266–69. http://dx.doi.org/10.1107/s0108270190011659.

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26

Balázs, Árpád, Zsolt Szakonyi, and Ferenc Fülöp. "Synthesis of alicyclicN-substituted 1,3-amino alcohols via 1,3-oxazines." Journal of Heterocyclic Chemistry 44, no. 2 (2007): 403–6. http://dx.doi.org/10.1002/jhet.5570440219.

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27

Guillarme, Stéphane, Karen Plé, Aline Banchet, Annie Liard, and Arnaud Haudrechy. "Alkynylation of Chiral Aldehydes: Alkoxy-, Amino-, and Thio-Substituted Aldehydes." Chemical Reviews 106, no. 6 (2006): 2355–403. http://dx.doi.org/10.1021/cr0509915.

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28

Larnaud, Florent, Charlène Calata, Anaïs Prunier, et al. "Convergent access to mono-fluoroalkene-based peptidomimetics." Organic & Biomolecular Chemistry 20, no. 6 (2022): 1205–18. http://dx.doi.org/10.1039/d1ob02441h.

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Expeditive racemic synthesis of monofluoroalkene peptide isosteres from aldehydes and substituted aromatic sulfones is reported. The olefination reaction is highly Z-selective from substituted aldehydes to afford transoid peptide mimic precursors.

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29

Hilt, Gerhard, Jan Fährmann, and Ludmila Hermann. "The Application of 1,2-Oxazinanes as Chiral Cyclic Weinreb Amide-Type Auxiliaries Leading to a Three-Component, One-Pot Reaction." Synthesis 54, no. 08 (2021): 2005–18. http://dx.doi.org/10.1055/a-1683-0484.

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Abstract1,2-Oxazines were synthesised via a copper-catalysed aerobic acyl nitroso Diels–Alder reaction from 1,4-disubstituted 1,3-dienes and N-Boc-hydroxylamine. From this, 1,2-oxazinanes were obtained in a novel follow-up reaction path. The stability of several 1,2-oxazines and 1,2-oxazinanes towards organometallic compounds was tested to rate their operability as cyclic chiral Weinreb amide auxiliaries. 3,6-Di-tert-butyl-1,2-oxazinane gave the best results and was introduced as a chiral Weinreb amide-type auxiliary to yield chiral α-substituted ketones in a diastereomeric ratio of up to 98:2

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30

Trost, B., та T. Zhang. "Asymmetric Synthesis of α-Substituted Aldehydes". Synfacts 2007, № 5 (2007): 0518. http://dx.doi.org/10.1055/s-2007-968279.

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31

Popkov, S. V., and A. V. Kuzenkov. "Synthesis of trifluoromethyl-substituted heteroaromatic aldehydes." Russian Chemical Bulletin 54, no. 7 (2005): 1672–74. http://dx.doi.org/10.1007/s11172-006-0020-x.

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32

Valenta, Zdenek, David I. MaGee та Santosa Setiadji. "Direct Alkylation of α-Substituted Aldehydes". Journal of Organic Chemistry 61, № 26 (1996): 9076–77. http://dx.doi.org/10.1021/jo9614710.

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33

Katritzky, Alan R., Irina V. Shcherbakova, Robert D. Tack, and Xue-Qian Dai. "Synthesis and some transformations of substituted 5,6-dihydro-4H-1,3-oxazines." Tetrahedron 49, no. 19 (1993): 3907–18. http://dx.doi.org/10.1016/s0040-4020(01)89906-3.

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34

Rickwood, M., S. D. Marsden, M. E. Ormsby, et al. "Red Colouring Photochromic 6′-Substituted Spiroindolinon Aphth[2,1-b][1,4]Oxazines." Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals 246, no. 1 (1994): 17–24. http://dx.doi.org/10.1080/10587259408037780.

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35

ZIMMER, R., and H. U. REISSIG. "ChemInform Abstract: Lithiated 3-Trifluoromethyl-Substituted 1,2-Oxazines and Their Reactions." ChemInform 28, no. 13 (2010): no. http://dx.doi.org/10.1002/chin.199713137.

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36

TOLCHINSKII, S. E., M. V. KORMER, and I. A. MARETINA. "ChemInform Abstract: Synthesis of 2-Substituted Naphth(1,8-de)-1,3-oxazines." ChemInform 23, no. 38 (2010): no. http://dx.doi.org/10.1002/chin.199238182.

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37

Cwik, Agnieszka, Zoltan Hell, Adrienn Hegedues, Zoltan Finta, and Zoltan Horvath. "ChemInform Abstract: A Simple Synthesis of 2-Substituted Oxazolines and Oxazines." ChemInform 33, no. 37 (2010): no. http://dx.doi.org/10.1002/chin.200237131.

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38

Bouché, Léa, and Hans-Ulrich Reissig. "Synthesis of novel carbohydrate mimetics via 1,2-oxazines." Pure and Applied Chemistry 84, no. 1 (2011): 23–36. http://dx.doi.org/10.1351/pac-con-11-09-20.

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The combination of lithiated alkoxyallenes with carbohydrate-derived nitrones constitutes a flexible entry to highly functionalized enantiopure 1,2-oxazine derivatives. They can be used as precursors for acyclic and cyclic carbohydrate-like products such as amino sugar alcohols, azetidine and pyrrolidine derivatives. The Lewis acid-promoted rearrangement of 1,3-dioxolanyl-substituted 1,2-oxazines to bicyclic compounds allows an efficient route to novel amino pyran and oxepane derivatives. After subsequent transformations, new carbohydrate mimetics or “real” carbohydrates were obtained in good

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39

Hashmi, A. Stephen K. "Gold-catalyzed synthesis of N,O-heterocycles." Pure and Applied Chemistry 82, no. 3 (2010): 657–68. http://dx.doi.org/10.1351/pac-con-09-10-17.

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The selective synthesis of oxazoles, alkylidene oxazoles, and 1,3-oxazines from N-propargyl carboxamides by choosing gold(III) or gold(I) catalysts and selecting terminal or internal alkynes as substrates is discussed. The mechanistic studies based on labeling experiments and intensive in situ NMR studies indicate an anti-oxyauration step and a proto-deauration with retention of the sterical arrangement at the double bond. The synthetic scope for gold(I) catalysts is very broad, allowing selective conversions to products with properties of chelate ligands, reactions of bromoarenes and the form

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40

Mehdiyeva, G. M. "Synthesis and Antimicrobial Activity of 3-Substituted 8-Propenylbenzo[e][1,3]oxazines." Russian Journal of Applied Chemistry 95, no. 2 (2022): 277–83. http://dx.doi.org/10.1134/s1070427222020070.

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41

Claveau, Elise, Isabelle Gillaizeau, Jérome Blu, Amélie Bruel, and Gérard Coudert. "Easy Access to New Heterocyclic Systems: 1,4-Oxazine and Substituted 1,4-Oxazines." Journal of Organic Chemistry 72, no. 13 (2007): 4832–36. http://dx.doi.org/10.1021/jo070528n.

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42

Ghomi, Javad Safaei, and Safura Zahedi. "Eco-friendly synthesis of highly substituted functionalized oxazines by FeCl3/SiO2 nanoparticles." Monatshefte für Chemie - Chemical Monthly 144, no. 5 (2012): 687–93. http://dx.doi.org/10.1007/s00706-012-0850-1.

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43

Hurtado, Marcela, J. Guillermo Contreras, Adelio Matamala, Otilia Mó, and Manuel Yáñez. "Conformational analysis, NMR properties and nitrogen inversion of N-substituted 1,3-oxazines." New Journal of Chemistry 32, no. 12 (2008): 2209. http://dx.doi.org/10.1039/b808929a.

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44

Hashmi, A. Stephen K., Andreas M. Schuster, Martin Schmuck, and Frank Rominger. "Gold-Catalyzed Cyclization of Nonterminal Propargylic Amides to Substituted Alkylideneoxazolines and -oxazines." European Journal of Organic Chemistry 2011, no. 24 (2011): 4595–602. http://dx.doi.org/10.1002/ejoc.201100342.

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45

Korepin, A. G., P. V. Galkin, E. K. Perepelkina, N. M. Glushakova, I. L. Eremenko та L. T. Eremenko. "N-substituted tetrahydro-1,3-oxazines and -oxazolidines. 2. Nitration of N-(ω-acylamino-β,β-dinitroalkyl)tetrahydro-1,3-oxazines and -oxazolidines". Russian Chemical Bulletin 58, № 10 (2009): 2103–8. http://dx.doi.org/10.1007/s11172-009-0287-9.

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46

Gazizov, M. B., R. A. Khairullin, A. I. Alekhina, and A. A. Bashkirtsev. "Synthesis of diacylals of amino-substituted aldehydes." Russian Journal of General Chemistry 81, no. 7 (2011): 1570–71. http://dx.doi.org/10.1134/s1070363211070310.

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47

Gazizov, M. B., R. A. Khairullin, N. G. Aksenov, and R. F. Karimova. "Synthesis and properties of dithiophosphato-substituted aldehydes." Russian Chemical Bulletin 64, no. 1 (2015): 237–40. http://dx.doi.org/10.1007/s11172-015-0850-5.

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48

Sapnakumari, M., K. Divya, K. B. Aswin, and J. Dalin. "Antimicrobial and Antioxidant Study of Some Newly Synthesized Chalcones and Cyclohexenone Derivatives." Asian Journal of Chemistry 35, no. 1 (2022): 114–18. http://dx.doi.org/10.14233/ajchem.2023.24057.

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Abstract:

Chalcones and cyclohexenone derivatives obtained from various substituted aldehydes and substituted acetophenones are described. Chalcones were obtained by the Claisen-Schmidt condensation reaction of aldehydes with substituted acetophenones. Base catalyzed cyclocondensation of ethyl acetoacetate to chalcones under microwave irradiation leads to the formation of cyclohexenone derivatives. The prepared compounds are characterized by IR, 1H NMR and 13C NMR spectral methods. These are screened for their antimicrobial activity against Staphylococcus aureus, Escherichia coli, Aspergillus niger, Asp

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49

Pongó, László, Péter Dvortsák, and József Reiter. "The Reaction of Dimethyl N-(1,2,4-Triazol-5-yl)iminodithiocarbonates with Dinucleophiles." Collection of Czechoslovak Chemical Communications 57, no. 1 (1992): 134–52. http://dx.doi.org/10.1135/cccc19920134.

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Abstract:

A series of N-(3-methylthio-1,2,4-triazol-5-yl) substituted carbamimidothioates (III), 2-iminoazolidines (IV, X = O, S, NH, n = 2), 2-iminohexahydro-1,3-oxazines (IV, X = O, n = 3), 2-iminohexahydropyrimidines (IV, X = NH, n = 3), and N,N'-alkylenebis(carbamimidothioates) (V) was prepared from dimethyl N-(3-methylthio-1,2,4-triazol-5-yl)iminodithiocarbonates (I). N-substituted azolidines IV, X = O, S, NH, n = 2, such as acetyl, methyl, (ethoxycarbonyl)methyl, 1-(ethoxycarbonyl)ethyl, 2-chloroethylcarbamoyl, 2-cyano-2-(ethoxycarbonyl)ethenyl, and 2,2-dicyanoethenyl, were also prepared. The stru

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50

Saloutina, L. V., M. I. Kodess, I. N. Ganebnykh, P. A. Slepukhin, V. I. Saloutin, and O. N. Chupakhin. "Heterocycles on the base of bis(trifluoromethyl)imidazolidin-2-ones, 2-aminoethanol and 2-aminophenol." Журнал органической химии 59, no. 4 (2023): 507–15. http://dx.doi.org/10.31857/s0514749223040092.

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Abstract:

Novel trifluoromethyl-containing imidazo-1,4-oxazines have been synthesized through the condensation reaction of 4,5-dihydroxy-4,5-bis(trifluoromethyl)imidazolidin-2-one with 2-aminoethanol (2-AE) and 2-aminophenol (2-APh). Unusual route of the reaction of 1-methyl(phenyl)- 4,5-dihydroxy-4,5-bis(trifluoromethyl)imidazolidin-2-ones with 2-AE has been found, leading to hydroxyethylamino-substituted hydantoins. The interaction of the N-substituted imidazolidines with 2-APh under similar conditions led to formation of rearrangement products, 5,5-bis(trifluoromethyl)hydantoins. The molecular struct

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