Efficient Enantioselective Synthesis of Dihydropyrans Using a Chiral <i>N</i>,<i>N</i>′‑Dioxide as Organocatalyst
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资源简介：
The bifunctional organocatalyst C3 N,N′-dioxide has been successfully applied to the asymmetric cascade Michael/hemiacetalization reaction of α-substituted cyano ketones and β,γ-unsaturated α-ketoesters for the synthesis of multifunctionalized chiral dihydropyrans. The corresponding products were obtained in excellent yields (up to 99%) with high to excellent enantioselectivities (up to 99% ee).
创建时间：
2016-02-19
