Organocatalytic Asymmetric Direct C sp 3H Functionalization of Ethers: A Highly Efficient Approach to Chiral Spiroethers
作者:Zhi-Wei Jiao、Shu-Yu Zhang、Chuan He、Yong-Qiang Tu、Shao-Hua Wang、Fu-Min Zhang、Yong-Qiang Zhang、Hui Li
DOI:10.1002/anie.201204274
日期:2012.8.27
Spiro compounds: An organocatalyticasymmetric method for the CH functionalization of the α position of racemic cyclic ethers has been developed. The transformation, mediated by catalytic amounts of an imidazolidinone and strong acid, involves a tandem 1,5‐hydride transfer/cyclization and provides access to a structurally diverse series of chiral spiroethers with high levels of enantioselectivity