Catalytic Diastereoselective Tandem Conjugate Addition-Elimination Reaction of Morita-Baylis-Hillman C Adducts by CC Bond Cleavage
作者:Wenguo Yang、Davin Tan、Richmond Lee、Lixin Li、Yuanhang Pan、Kuo-Wei Huang、Choon-Hong Tan、Zhiyong Jiang
DOI:10.1002/asia.201100863
日期:2012.4
Through the cleavage of the CC bond, the first catalytic tandem conjugate addition–elimination reaction of Morita–Baylis–Hillman C adducts has been presented. Various SN2′‐like C‐, S‐, and P‐allylic compounds could be obtained with exclusive E configuration in good to excellent yields. The Michael product could also be easily prepared by tuning the β‐C‐substituent group of the α‐methylene ester under
通过CC键的裂解,提出了Morita-Baylis-Hillman C加合物的第一个催化串联共轭加成-消除反应。可以通过独家E 构型获得各种S N 2'-样C-,S-和P-烯丙基化合物,并具有良好或优异的收率。在相同的反应条件下,通过调节α-亚甲基酯的β-C-取代基也可以很容易地制备迈克尔产物。通过DFT方法计算的各种跃迁状态的相对能量有力地支持了所观察到的化学选择性和非对映选择性。