has been performed with very good results by using a catalytic amount of Me2Zn (0.15 equiv) to generate the organozincate. Yields and/or diastereoselectivities of the formed α-branched sulfinamides improve in comparison with the values obtained in the same reactions carried out with an excess of a previously formed triorganozincate. On the other hand, the transfer of the two alkyl groups of a dialkylzinc
通过使用催化量的Me 2 Zn(0.15当量)产生
有机锌酸盐,已经将三
有机锌酸盐添加到(R)-N-(叔
丁烷亚磺酰基)苯并二胺中,具有非常好的结果。与在过量的先前形成的三
有机锌酸酯进行的相同反应中获得的值相比,所形成的α-支化亚磺酰胺的产率和/或非对映选择性提高。另一方面,通过使用0.5当量的二烷基
锌和1.5当量的MeMgBr生成三烷基
锌酸酯,已经实现了二烷基
锌试剂的两个烷基向
亚胺的转移。在这两种方法中,均获得了良好的优异收率和非对映异构体比率(高达98:2)。