Highly enantioselective Biginelli reaction catalyzed by SPINOL-phosphoric acids
作者:Fangxi Xu、Dan Huang、Xufeng Lin、Yanguang Wang
DOI:10.1039/c2ob25663k
日期:——
A highlyenantioselectiveBiginellireaction promoted by chiral spirocyclic SPINOL-phosphoric acids has been developed. Under the optimized conditions with 5 mol% catalyst loading, a wide range of optically active dihydropyrimidinethiones (DHPMs) were obtained in high yields (up to 98%) with good to excellent enantioselectivities (up to 99% ee). The synthetic utility of this method was demonstrated