Highly Enantio- and Diastereoselective Allylic Alkylation of Morita–Baylis–Hillman Carbonates with Allyl Ketones
作者:Guanghu Tong、Bo Zhu、Richmond Lee、Wenguo Yang、Davin Tan、Caiyun Yang、Zhiqiang Han、Lin Yan、Kuo-Wei Huang、Zhiyong Jiang
DOI:10.1021/jo400496z
日期:2013.5.17
The asymmetric allylic alkylation of Morita–Baylis–Hillman (MBH) carbonates with allyl ketones has been developed. The α-regioselective alkylation adducts, containing a hexa-1,5-diene framework with important synthetic value, were achieved in up to 83% yield, >99% ee, and 50:1 dr by using a commercially available Cinchona alkaloid as the catalyst. From the allylic alkylation adduct, a cyclohexene bearing
已开发出具有烯丙基酮的Morita-Baylis-Hillman(MBH)碳酸盐的不对称烯丙基烷基化反应。通过使用市售的金鸡纳生物碱(Cinchona alkaloid)作为高合成产率的α-区域选择性烷基化加合物,该化合物具有重要的合成价值,其产率为83%,ee大于99%ee,50:1 dr,具有重要的合成价值。催化剂。从烯丙基烷基化加合物容易制备带有两个相邻手性中心的环己烯。