Synthesis of thiazinobenzimidazole derivatives in a solventless system under microwave irradiation
A series of thiazino [3,2-a] benzimidazole derivatives were synthesized in a solventless system under microwave irradiation in a very short time and in excellent yields. Copyright Taylor & Francis Inc.
Heravi, Majid M.,Nami, Navabeh,Oskooie, Hossien A.,Hekmatshoar, Rahim
Isoquinoline-mediated S-vinylation and N-vinylation of benzo[d]oxazole-2- thiol and benzo[d]thiazole-2-thiol
An effective route to S-vinylated and N-vinylated benzo[d]oxazole-2(3H)- thiones and benzo[d]thiazole-2(3H)-thiones is described via reaction of acetylenic esters and benzo[d]oxazole-2-thiol and benzo[d]thiazole-2-thiol in the presence of 15 mol% of isoquinoline.
Yavari, Issa,Nasiri-Gheidari, Samira,Mirzaei, Anvar
Addition Reactions of Heterocyclic Compounds. Part 74. Products from Dimethyl Acetylenedicarboxylate with Thiourea, Thioamide, and Guanidine Derivatives
Benzimidazole-2-thione with dimethyl acetylenedicarboxylate (DMAD) in acetonitrile gave a fused thiazolidinone derivative, but in methanol a fused thiazinone was obtained.Structures were assigned to adducts from other thioureas by comparison with the 13C n.m.r. spectra for these compounds.A method has been developed for distinguishing between the possible structural types of adducts for guanidine and amidine derivatives with DMAD using 1H and 13C n.m.r. spectroscopy.Products from various thioamides and DMAD were identified from their n.m.r. and other spectra.
Acheson, R. Morrin,Wallis, John D.
p. 415 - 422
(2007/10/02)
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