Methylglyoxal is successfully converted to the tin(II) enediolate on treatment with activated metallic tin. The tin(II) enediolate reacts with several aldehydes to give α, β-dihydroxyketones in good yields.
甲基乙二醛在用活化的金属锡处理后成功转化为烯二醇锡 (II)。烯二醇锡 (II) 与几种醛反应以良好的产率得到 α, β-二羟基酮。
An efficient organo-catalytic, highly syn-stereoselective method for aldol additions between enolizable aldehydes and hydroxyacetone as well as dihydroxyacetone is disclosed. Reactions proceed in the presence of tertiary amines at room temperature. The aldol adducts can be obtained in good to high yields and with high degrees of syn-diastereoselectivity. This new aldol reaction provides an operationally simple protocol for the stereocontrolled synthesis of carbohydrates