Assembly of 4-Substituted 3-Nitro-1,2,3,4-tetrahydropyridines via Organocatalytic Michael Addition
作者:Lele Huo、Anqi Ma、Yihua Zhang、Dawei Ma
DOI:10.1002/adsc.201100903
日期:2012.4.16
An organocatalytic Michael addition of protected 2‐amino‐1‐nitroethanes to α,β‐unsaturated aldehydes followed by treatment with TFA afforded 4‐substituted 3‐nitro‐1,2,3,4‐tetrahydropyridines with good diastereoselectivity and excellent enantioselectivity. Good yields were observed in the case of β‐aryl‐substituted α,β‐unsaturated aldehydes as the substrates, while moderate yields were obtained when
对α,β-不饱和醛进行有机催化迈克尔加成保护的2-氨基-1-硝基乙烷,然后用TFA处理,得到具有良好非对映选择性和出色对映选择性的4-取代的3-硝基1,2,3,4-四氢吡啶。以β-芳基取代的α,β-不饱和醛为底物时,观察到良好的产率,而当使用β-烷基取代的α,β-不饱和醛时,获得中等产率。