A new steroselective route to .GAMMA.-butyrolactones: asymmetric syntheses of (+)-trans-whisky and (+)-trans-cognac lactones.
作者:Okiko MIYATA、Tetsuro SHINADA、Nanako KAWAKAMI、Kyoko TAJI、Ichiya NINOMIYA、Takeaki NAITO、Tadamasa DATE、Kimio OKAMURA
DOI:10.1248/cpb.40.2579
日期:——
A new stereoselective route to γ-butyrolactones such as (+)-trans-whisky and (+)-trans-cognac lactones (1a, b) has been developed by a combination of three key reactions : diastereoselective nucleophilic addition of thiophenol, cleavage of chiral N-acylsultam via thioester, and intramolecular displacement of the sulfonium group with carboxylate anion.
通过结合三个关键反应:噻吩酚的非对映选择性亲核加成、手性 N-acylsultam 通过硫酯的裂解以及羧酸阴离子对锍基团的分子内置换,我们开发出了一条新的立体选择性路线来制备γ-丁内酯,如 (+)-trans-whisky 和 (+)-trans-cognac 内酯 (1a,b)。