An efficient TaBr5 (5-10 mol %)-catalyzed Biginelli reaction under solvent-free conditions for one-pot syntheses of 3,4-dilhydropyrimidin-2-(] H)-ones (DHPMs) and their thione analogs is reported. The catalyst is stable at room temperature and employed under mild and environmentally friendly conditions. (c) 2007 Elsevier Ltd. All rights reserved.
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Indian Inst Petr, Chem & Biotechnol Div, Dehra Dun 248005, Uttar Pradesh, IndiaIndian Inst Petr, Chem & Biotechnol Div, Dehra Dun 248005, Uttar Pradesh, India
Jain, Suman L.
Sharma, Vishal B.
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Indian Inst Petr, Chem & Biotechnol Div, Dehra Dun 248005, Uttar Pradesh, IndiaIndian Inst Petr, Chem & Biotechnol Div, Dehra Dun 248005, Uttar Pradesh, India
Sharma, Vishal B.
Sain, Bir
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Indian Inst Petr, Chem & Biotechnol Div, Dehra Dun 248005, Uttar Pradesh, IndiaIndian Inst Petr, Chem & Biotechnol Div, Dehra Dun 248005, Uttar Pradesh, India