A catalytic amount of KF.18-crown-6 complex is effective as a soluble fluoride source to activate an asymmetric Sakurai-Hosomi allylation with BINAP and silver(I) triflate catalyst. The allylation of a variety of aromatic, alpha,beta-unsaturated and aliphatic aldehydes with allylic trimethoxysilane resulted in high yields and remarkable enantioselectivities. In addition, the asymmetric Mukaiyama-type
New catalytic asymmetric Mukaiyama-type aldol reaction using trimethoxysilyl enol ethers was achieved using p-Tol-BINAP · AgF complex as a catalyst. High syn- and enantioselectivities were obtained both from the E- and Z-silyl enol ethers.
以对 Tol-BINAP - AgF 复合物为催化剂,利用三甲氧基硅基烯醇醚实现了新的催化不对称 Mukaiyama 型醛醇反应。E 型和 Z 型硅烷烯醇醚均获得了较高的合成和对映体选择性。