Light-induced dehydrogenation of 3,4-dihydropyrimidin-2(1H)-ones
作者:Hamid Reza Memarian、Asadollah Farhadi
DOI:10.1007/s00706-009-0156-0
日期:2009.10
UV light irradiation of Biginelli 3,4-dihydropyrimidin-2(1H)-ones in chloroform in an argon atmosphere leads to dehydrogenation of these compounds to their corresponding pyrimidin-2(1H)-ones in excellent yields. Irradiation in the same solvent under an oxygen atmosphere generates, in addition, various hitherto unidentified products. A light-induced electron transfer from the substrate to the solvent is proposed as the initial event, supported by the detection of dichloromethane and hydrogen chloride in the photolysate.