Dual Organocatalysis: Asymmetric Allylic-Allylic Alkylation of α,α-Dicyanoalkenes and Morita-Baylis-Hillman Carbonates
作者:Hai-Lei Cui、Jing Peng、Xin Feng、Wei Du、Kun Jiang、Ying-Chun Chen
DOI:10.1002/chem.200802534
日期:2009.2.2
The first highly enantioselective allylic–allylic alkylation of α,α‐dicyanoalkenes and Morita–Baylis–Hillman carbonates by dual catalysis of (DHQD)2AQN and (S)‐BINOL has been investigated. Excellent stereoselectivities have been achieved for a broad spectrum of substrates (d.r. > 99:1, up to 99 % ee). The multifunctional allylic products could be efficiently converted to a range of complex chiral cyclic
通过(DHQD)2 AQN和(S)-BINOL的双重催化作用,首次研究了α,α-二氰基烯烃和Morita-Baylis-Hillman碳酸盐的高对映选择性烯丙基-烯丙基烷基化反应。对于广泛的底物(dr> 99:1,高达99%ee),已经实现了出色的立体选择性 。多功能烯丙基产物可以有效地转化为一系列复杂的手性环状骨架。EWG =吸电子基团(DHQD)2 AQN =对苯二酚(蒽醌-1,4-二甲苯基)二醚,(S)-BINOL =(S)-(-)-1,1'-bi-2-萘酚。