Oxidation of thiazolo[3,2-a]pyrimidin-3(2H)-ones with DMSO and Lawesson’s reagent
摘要:
2,2'-Dimers with a central double bond were prepared by the oxidation of 5,6-disubstituted 7-methyl-5H-[1,3]thiazolo[3,2-a]pyrimidin-3(2H)-ones with DMSO and Lawesson's reagent at room temperature. The role of DMSO as an oxidizing reagent was confirmed by NMR spectroscopy. The E-configuration of the central C=C bond for the two diastereomers of compound 8m was proven by single crystal X-ray data. The dimeric thiazolopyrimidines were orange or red colored and absorption bands at 283-330 and 459-476 nm were observed in the UV spectra. (C) 2018 Elsevier Ltd. All rights reserved.
A Simple and Efficient One-Pot Synthesis of Multifunctional 5-Aryl-<i>5H</i>-thiazolo[3,2-a]pyrimidines
作者:Seerat Fatima、Anindra Sharma、Rahul Sharma、Rama P. Tripathi
DOI:10.1002/jhet.831
日期:2012.5
One‐pot economical and efficientsynthesis of multifunctional 5H‐thiazolo[3,2‐a]pyrimidines by the reaction of 4‐aryl dihydrothiopyrimidines with propargyl bromide in the presence of inorganic base has been reported in very short time.
El-Hamouly, Wageeh S.; El-Khamry, Abdel-Momen A.; Abbas, Eman M. H., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2006, vol. 45, # 9, p. 2091 - 2098
作者:El-Hamouly, Wageeh S.、El-Khamry, Abdel-Momen A.、Abbas, Eman M. H.