Highly Regio- and Enantioselective Synthesis of γ,δ-Unsaturated Amido Esters by Catalytic Hydrogenation of Conjugated Enamides
作者:Min Gao、Jing-jing Meng、Hui Lv、Xumu Zhang
DOI:10.1002/anie.201410213
日期:2015.2.2
An efficient and highly regio‐ and enantioselectivecatalytic asymmetric hydrogenation of α,γ‐dienamido esters to γ,δ‐unsaturated amidoesters has been achieved using Rh/TangPhos as the catalyst. A series of γ,δ‐unsaturated amido acids were furnished in excellent yields with up to 99 % ee. This effective methodology was applied in the asymmetric synthesis of key intermediate of Ramipril, an ACE inhibitor