Sterically Constrained 'Roofed' 2-Thiazolidinones as Excellent Chiral Auxiliaries.
作者:Shigeki HOSHIMOTO、Hirofumi MATSUNAGA、Takehisa KUNIEDA
DOI:10.1248/cpb.48.1541
日期:——
The "roofed" chiral 2-thiazolidinones, which are sterically congested and conformational rigid, and which are perpared by the [4+2] cycloaddition of 2-thiazolone to the cyclic dienes, dimethylanthracene and hexamethylcyclopentadiene, followed by optical resolution with (1S, 2R)-2-methyoxy-1-apocamphanecarbonic acid (MAC acid) are of considerable promise for use as chiral auxiliaries for the alkylation of enolates.
2-thiazolone 与环状二烯、二甲基蒽和六甲基环戊二烯发生 [4+2] 环加成反应,然后用 (1S, 2R)-2-methyoxy-1-apocamphanecarbonic acid(MAC 酸)进行光学解析,从而制备出 "带顶 "手性 2-thiazolidinones ,这种手性 2-thiazolidinones 具有立体拥挤和构象刚性的特点,很有希望用作烯醇类化合物烷基化的手性助剂。