Asymmetric Synthesis of γ-Secondary Amino Alcohols via a Borrowing-Hydrogen Cascade
作者:Yupeng Pan、Yipeng You、Dongxu He、Fumin Chen、Xiaoyong Chang、Ming Yu Jin、Xiangyou Xing
DOI:10.1021/acs.orglett.0c02614
日期:2020.9.18
The borrowing-hydrogen (or hydrogen autotransfer) process, where the catalyst dehydrogenates a substrate and formally transfers the H atom to an unsaturated intermediate, is an atom-efficient and environmentally benign transformation. Described here is an example of an asymmetric borrowing-hydrogen cascade for the formal anti-Markovnikov hydroamination of allyl alcohols to synthesize optically enriched
借贷氢(或氢自动转移)工艺是一种对原子有效的,对环境无害的转化工艺,其中催化剂将底物脱氢并将H原子正式转移至不饱和中间体。这里描述的是不对称的借位氢级联的实例,用于烯丙醇的形式上的反马尔科夫尼科夫加氢胺化反应,以合成光学富集的γ-仲氨基醇。通过利用具有最小立体异构性的Ru- (S)-i PrPyme催化剂,开发了一种包括脱氢,共轭加成和不对称还原的级联过程。温和的条件,官能团的耐受性和广泛的底物范围(54个实例)证明了催化体系的合成实用性。