Asymmetric Synthesis of Spiro-3,4-dihydropyrans via a Domino Organocatalytic Sequence
作者:Weijun Yao、Lianjie Pan、Yihua Wu、Cheng Ma
DOI:10.1021/ol1007873
日期:2010.5.21
A cinchona alkaloid-catalyzed domino Michael/hemiacetalization reaction of cyclic beta-oxo aldehydes and aromatic beta,gamma-unsaturated a-keto esters, resulting in the formation of spiro-dihydropyran architectures in good yield with high stereoselectivity (up to 97% ee), is presented.