Boron aldol reaction of α-halosubstitued thioacetates with silyl imines: A highly enantio- and diastereoselective synthesis of aziridines
作者:Cesare Gennari、Gilles Pain
DOI:10.1016/0040-4039(96)00637-5
日期:1996.5
Boron enolates derived from tert-butyl α-halothioacetate and bearing menthone-derived chiral ligands react with imines with excellent diastero- and enantiocontrol to give syn α-halo-β-aminothioesters, which can be converted to the corresponding aziridines by simple ring closure during LAH reduction. A key precursor of antibiotics (+)-thiamphenicol and (−)-florfenicol was synthesized.
衍生自α-卤代硫代乙酸叔丁酯并带有薄荷酮的手性配体的硼烯醇盐与亚胺反应,具有优异的非对映和对映体控制能力,可生成合成α-卤代-β-氨基硫酯,可通过在闭环过程中进行简单的闭环反应将其转化为相应的氮丙啶减少LAH。合成了抗菌素(+)-噻吩酚和(-)-氟苯尼考的关键前体。