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.