In the presence of a novel chiral catalyst system consisting of tin(II) triflate, a chiral diamine, and tin(II) oxide, highly enantioselective aldol reactions of the silyl enol ether of S-ethyl ethanethioate or S-ethyl propanethioate with aldehydes proceeded smoothly to afford the aldol adducts in high yields.
在由三酸
锡(II)、手性二胺和氧化
锡(II)组成的新型手性催化剂体系存在下,S-乙基
硫代乙酸甲
硅烷基烯醇醚或 S-乙基
硫代
丙酸甲
硅烷基烯醇醚与醛的高对映选择性醛醇反应顺利进行,并以高产率得到醛醇加合物。