Lithium enolates derived from the title esters show high diastereoface selectivity in their reactions with chiral aldehydes. The resulting 2,2-dithioaldols are desulfurized in good yield with Ni2B-H2 (EtOH, 20°C). With this mild desulfurization protocol, complete retention of stereochemical integrity was observed for all isolated aldols.
衍生自标题酯的烯醇
锂在与手性醛的反应中显示出高的非对映体选择性。用Ni 2 B-H 2(EtOH,20℃)以高收率将所得的2,2-二
硫代醛醇脱
硫。使用这种温和的脱
硫方案,可以观察到所有分离的醛醇完全保留立体
化学完整性。