reactions using a catalytic amount of tin(II) reagents have been developed. Namely, an aldol type reaction of tin(II) enolate is achieved starting from α,β-unsaturatedketone, aldehyde and ethylthiotrimethylsilane in the presence of a catalytic amount of tin(II) triflate sulfide. Furthermore, the catalyticasymmetric Michael reaction of tin(II) enethiolate is realized just by using a catalytic amount of tin(II)
The enantioselectiveMichaeladdition reaction of tin(II) enolates to variousα, β-unsaturated ketones is successfully achieved by employing chiral diamine ligands.
通过使用手性二胺配体成功实现了锡 (II) 烯醇化成各种 α, β-不饱和酮的对映选择性迈克尔加成反应。