The 1,2-addition of alkyl Grignard reagents to readily available N-tert-butanesulfinyl ketimines, bearing an α-silyloxy substituent, proceeds in high yields and excellent diastereocontrol. The utility of the present method was demonstrated by the synthesis, in enantiomerically pure form, of one recently disclosed β-secretase (BACE1) inhibitor.
将烷基
格氏试剂与容易获得的带有δ-
硅氧基取代基的 N-叔丁基亚磺
酰亚胺进行 1,2 加成,产量高,非对映控制极佳。最近公开的一种δ-分泌酶(
BACE1)
抑制剂的对映体纯合成证明了这种方法的实用性。