Catalytic Asymmetric Aldol Reaction of Trimethoxysilyl Enol Ethers Using 2,2′-Bis(di-<i>p</i>-tolylphosphino)-1,1′-binaphthyl·AgF Complex
作者:Akira Yanagisawa、Yoshinari Nakatsuka、Kenichi Asakawa、Manabu Wadamoto、Hiromi Kageyama、Hisashi Yamamoto
DOI:10.1246/bcsj.74.1477
日期:2001.8
Catalytic asymmetric Mukaiyama-type aldol reaction using trimethoxysilyl enol ethers was achieved using 2,2′-bis(di-p-tolylphosphino)-1,1′-binaphthyl (p-Tol-BINAP)·AgF complex as a catalyst. The chiral silver(I) catalyst was easily generated by mixing p-Tol-BINAP and silver(I) fluoride in MeOH at room temperature. High syn- and enantioselectivities were obtained from both the E- and Z-silyl enol ethers
以2,2'-双(二-对甲苯基膦基)-1,1'-联萘(p-Tol-BINAP)·AgF配合物为催化剂,实现了三甲氧基甲硅烷基烯醇醚催化不对称Mukaiyama型羟醛反应。通过在室温下将 p-Tol-BINAP 和氟化银 (I) 在 MeOH 中混合,很容易生成手性银 (I) 催化剂。E-和Z-甲硅烷基烯醇醚都获得了高的顺对映选择性。在环己酮衍生的三甲氧基甲硅烷基烯醇醚的反应中使用 MeOH 和丙酮的 1:1 混合物作为溶剂导致更高的对映选择性。