Borane-Catalyzed Direct Asymmetric Vinylogous Mannich Reactions of Acyclic α,β-Unsaturated Ketones
作者:Jun-Jie Tian、Ning Liu、Qi-Fei Liu、Wei Sun、Xiao-Chen Wang
DOI:10.1021/jacs.1c00006
日期:2021.3.3
Herein, we report that, by using chiral bicyclic bisborane catalysts, we have achieved the first highly regio-, diastereo-, and enantioselective direct asymmetric vinylogous Mannich reactions of acyclic α,β-unsaturated ketones. The strong Lewis acidity and steric bulk of the bisborane catalysts were essential for the observed high yields and selectivities.
在此,我们报道,通过使用手性双环双硼烷催化剂,我们获得了第一个高度无环,非对映和对映选择性的不饱和α,β-不饱和酮的不对称乙烯基类曼尼希反应。双硼烷催化剂的强路易斯酸度和空间位阻对于观察到的高收率和选择性至关重要。