An efficient and rapid procedure for the synthesis of 2,4-disubstituted-1,3-thiazoles and selenazoles has been described by the reaction of α-bromoketones with thiourea, phenylthiourea and selenourea at ambient temperature in aqueousmediumunder ultrasonic irradiation. Analytically pure products were formed within 10–60 s in excellent yields. The advantageous features of this non-conventional methodology
Ramanna, S.; Rao, V. Rajeswar; Kumari, T. Surya, Phosphorus, Sulfur and Silicon and the Related Elements, 1995, vol. 107, # 1-4, p. 197 - 204
作者:Ramanna, S.、Rao, V. Rajeswar、Kumari, T. Surya、Rao, T. V. Padmanabha
DOI:——
日期:——
Synthesis and biological evaluation of some new coumarinyl thiazolopyrimidinones
作者:Naazneen B. Yaragatti、Manohar V. Kulkarni、Manjunath D. Ghate、Satyanarayan S. Hebbar、Ganesh R. Hegde
DOI:10.1080/17415990903569544
日期:2010.4
Two new series of coumarin linked, linear and angularly fused thiazolo-[3,2-a]-pyrimidinones have been synthesized from 3-bromoacetyl coumarins by azole and azine approaches. Regioisomeric 5H and 7H thiazolo-[3,2-a]-pyrimidinones have been clearly distinguished by their IR and UV fluorescence spectral data. All the compounds have been characterized by analytical and spectroscopic methods. Rate and yield enhancements have been achieved using microwave irradiation. The results of in vivo diuretic activity indicate that substituents on coumarin do not enhance the activity. In vitro antimicrobial activities have shown that the compounds are specifically active against Gram-positive but are inactive against Gram-negative bacterial strains. Moderate fungal activity was observed against Candida albicans and Penicillium chrysogenum and all the compounds were found to be inactive against Aspergillus niger.
Aditya Vardhan; Rajeshwar Rao, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1997, vol. 36, # 12, p. 1085 - 1088