Iodine Catalyzed One-Pot Synthesis of 3,4-Dihydropyrimidin-2(1<i>H</i>)-ones and Thiones: A Simple and Efficient Procedure for the Biginelli Reaction
作者:Biswanath Das、K. V. Srinivas
DOI:10.1055/s-2004-829170
日期:——
Iodine efficientlycatalyzes the Biginelli reaction. This procedure involves a one-pot three-component cyclocondensation of aldehydes, 1,3-dicarbonyl compounds and urea or thiourea to afford the corresponding 3,4-dihydropyrimidin-2(1H)-ones or thiones in high yields.
supported on silica gel (HBF4‐SiO2) catalyzes efficiently the threecomponent condensation of an aldehyde, a 1,3‐dicarbonyl compound and urea or thiourea to afford the corresponding 3,4‐dihydropyrimidin‐ 2(1H)‐ones and thiones in high yields. The ambient conditions, fast reaction rates, and excellent product yields are the important characteristics of this reaction.