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 enantioselective catalytic asymmetric hydrogenation of α,γ‐dienamido esters to γ,δ‐unsaturated amido esters 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
使用Rh / TangPhos作为催化剂,可以实现高效的,高区域和对映选择性的α,γ-二酰胺基酯催化不对称加氢成γ,δ-不饱和酰胺基酯。提供了一系列γ,δ-不饱和酰胺酸,收率高达99%ee,产率极高。该有效方法应用于ACE抑制剂雷米普利的关键中间体的不对称合成。