The aldol reaction of silyl enolates with aldehydes or acetals using a lanthanide trifluoromethanesulfonate as catalyst smoothly proceed in organic solvents to afford the corresponding aldol-type adducts in high yields. The catalyst can be easily recovered after the reaction is completed, and yields of the 2nd run of the catalyst are comparable to those of the 1st run.
使用稀土
三氟甲磺酸盐作为催化剂,在有机溶剂中
硅烯醇盐与醛或
缩醛的醇醛反应顺利进行,以高产率得到相应的醇醛型加合物。催化剂在反应结束后可以轻松回收,并且第二轮催化剂的产率与第一轮相当。