Journal ArticleDOI
Synthetic Studies on 2H-Thiopyran Compounds: A Reinvestigation of the Reaction Between Benzaldehydes and Sodium Sulfide
Avijit Banerji,Pizush Kanti Biswas,Debasish Bandyopadhyay,Maya Gupta,Thierry Prangé,Alain Neuman +5 more
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In this paper, the synthesis of 2H-thiopyran compounds from substituted benzaldehydes with sodium sulfide (Na2S·10H2O) in aqueous ethanol was carried out.Abstract:
An investigation regarding the synthesis of 2H-thiopyran compounds from substituted benzaldehydes with sodium sulfide (Na2S·10H2O) in aqueous ethanol was carried out. The structural elucidation of the products was performed by spectroscopic methods and in one example as X-ray crystallographic analysis. A plausible mechanistic pathway is also proposed that is entirely different from an earlier report.read more
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Journal ArticleDOI
Microwave-Assisted Synthesis of Six-Membered O-Heterocycles
Navjeet Kaur,Dharma Kishore +1 more
TL;DR: An overview of the application of microwave irradiation in oxygen-containing six-membered heterocyclic compounds synthesis is presented, focusing on the developments in the past 5-10 years as mentioned in this paper.
Journal ArticleDOI
One-Pot Three-Component Synthesis of 3-Methyl-4-Arylmethylene- Isoxazol-5(4H)- Ones Catalyzed by Sodium Sulfide
Qing Liu,Xianming Hou +1 more
TL;DR: In this paper, 3-Methyl-4-arylmethylene-isoxazol-5(4H)-ones were synthesized by the convenient three-component reaction of ethyl acetoacetate, hydroxylamine hydrochloride, and aromatic aldehydes catalyzed by sodium sulfide.
Journal ArticleDOI
Chemical and anticancer activity studies for some 3-chloro-3-chlorosulfenyl-4′-methylspiro[chroman-2,1′-cyclohexane]-4-ones
Tamer El Malah,Ahmed H. Shamroukh,Eman R. Kotb,Hanan A. Soliman,Khaled Mahmoud,Mohamed I. Hegab +5 more
TL;DR: In this paper, the reaction of spiro 4′-methylcyclohexan-1′,2-chroman-4-one with thionyl chloride according to re...
Book ChapterDOI
Thiopyrans and Their Benzo Derivatives
TL;DR: The chemistry of thiopyrans and their benzo derivatives are covered in this paper , where studies on structural methods and elucidation of photochemical properties have been mentioned, as well as the use of the titled compounds in pharmaceutical, biological and material applications.
References
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Journal ArticleDOI
13C substituent effects in monosubstituted benzenes
TL;DR: In this paper, a brief analysis of the current understanding of substituent perturbations in monosubstituted benzenes as determined by substituents induced carbon chemical shifts is presented.
Journal ArticleDOI
Highly diastereoselective cycloaddition reactions of variously substituted 1-thia- and 1-thia-3-aza-buta-1,3-dienes. Synthesis of enantiomerically pure 5,6-dihydro-4H-[1,3]thiazines and 3,4-dihydro-2H-thiopyrans
TL;DR: The cycloaddition of 2- or 2,3-substituted 1-thia- and 1 -thia-3-aza-4-dimethylamino-buta-1, 3-dienes with various dienophiles in the presence of a Lewis acid provides a rapid and diastereoselective access to the 3,4-dihydro-2H-thiopyran and 5,6-diphysine backbones as discussed by the authors.
Journal ArticleDOI
Efficient Synthesis of Functionalized 2 H -Thiopyrans via Hetero- Diels - Alder Reactions of an Enaminothione with Electrophilic Olefins
TL;DR: The hetero-Diels-Alder reaction of 3-dimethylamino-1-(2-thienyl)-2-propene-1-thione (diene) with substituted β-nitrostyrenes, as well as maleic and fumaric acids (dienophiles) yielded 3,4-dihydro-2H-thiopyran derivatives as discussed by the authors.
Journal ArticleDOI
A new approach to the stereospecific total synthesis of racemic Cecropia juvenile hormone
TL;DR: In this paper, the synthesis of C18-juvenil hormone was studied using 4.4-Methyl-5,6-dihydro-2H-thiopyran and its dimer.
Journal ArticleDOI
Synthesis of Some New Spirothiopyran Derivatives from the Reaction of 4-Thiopyrylidenemalononitriles with Bidentate and Active Methylene Reagents
TL;DR: In this paper, 2,6-Diphenyl and 2,phenyl-6-p-tolyl-4-thiopyrylidenemalomonitriles have been synthesized as f, g -unsaturated nitriles from the condensation of 2, 6-diphensyl with malononitrile.