A Sequential Pd-AAA/Cross-Metathesis/Cope Rearrangement Strategy for the Stereoselective Synthesis of Chiral Butenolides
作者:Sidonie Aubert、Tania Katsina、Stellios Arseniyadis
DOI:10.1021/acs.orglett.9b00521
日期:2019.4.5
practical and highly enantio- (up to 94:6 er) and diastereoselective (up to >20:1 dr) synthesis of γ-butenolides bearing two adjacent stereogenic centers is reported featuring a sequential direct palladium-catalyzed asymmetric allylic alkylation/(E)-selective cross-metathesis/[3,3]-sigmatropic Cope rearrangement from readily available α-substituted (5H)-furan-2-ones.
据报道,具有两个相邻的立体中心的γ-丁烯内酯的实用且高度对映体(高达94:6 er)和非对映选择性(高达> 20:1 dr)合成具有连续直接钯催化的不对称烯丙基烷基化/(E选择性交叉复分解/ [3,3]-σ应对重排,从容易获得的α-取代的(5 H)-呋喃-2-酮中获得。