Highly Enantioselective Organocatalytic Biginelli and Biginelli-Like Condensations: Reversal of the Stereochemistry by Tuning the 3,3′-Disubstituents of Phosphoric Acids
作者:Nan Li、Xiao-Hua Chen、Jin Song、Shi-Wei Luo、Wu Fan、Liu-Zhu Gong
DOI:10.1021/ja905320q
日期:2009.10.28
and Biginelli-likereactions by chiral phosphoric acids derived from 3,3'-disubstituted binaphthols have been investigated. The size of 3,3'-substituents of the catalysts is able to control the stereochemistry of the Biginelli reaction. By tuning the 3,3'-disubstituents of the phosphoric acids, the stereochemistry of the Biginelli reaction can be reversed. This organocatalytic Biginelli reaction by
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