作者:Anne C. Meister、Paul F. Sauter、Stefan Bräse
DOI:10.1002/ejoc.201300752
日期:2013.11
A catalytic enantioselective approach to 4-hydroxy-6-methylcyclohex-2-enones is presented herein. The stereogenic information is generated through a copper-catalyzed 1,4-addition to p-benzoquinone monoketal using a chiral, BINOL-based (BINOL = 1,1′-bi-2-naphthol) phosphane ligand, according to the procedure of Feringa et al. A CBS (Corey–Bakshi–Shibata) reduction of the 1,4-adducts gave the four possible
本文介绍了 4-羟基-6-甲基环己-2-烯酮的催化对映选择性方法。根据 Feringa 的程序,使用手性 BINOL 基(BINOL = 1,1'-bi-2-萘酚)膦配体,通过铜催化 1,4-加成到对苯醌单缩酮生成立体信息等。1,4-加合物的 CBS(Corey-Bakshi-Shibata)还原分两步得到四种可能的异构体和 82-97% ee(对映体过量),起始于市售的 4,4-二甲氧基环六-2,5- dien-1-一 (7)。