Tin(II) enolates, generated in situ by the oxidative addition of α-bromoketones to metallic tin, react with a variety of carbonyl compounds under mild conditions to give the corresponding aldols in good yields. In the case of reactions of the enolate resulted from α-substituted α-bromoketone with aldehydes, remarkably high erythro-selectivities are attained.
锡 (II) 烯醇化物通过 α-
溴酮与
金属
锡的氧化加成原位生成,在温和条件下与各种羰基化合物反应,以良好的收率得到相应的醛醇。在由 α-取代的 α-
溴酮与醛产生的烯醇反应的情况下,获得了非常高的赤型选择性。