the stereodirecting effect of the N-toluenesulfonamide in an anti-diastereoselective (8.5:1) vinyl Grignard addition to an analogue of Garner’s aldehyde. Both aryl and alkyl Grignards are shown to give increased anti-selectivity compared with N-Boc Garner’s aldehyde.
据报道,β-
乙烯基丝氨酸合成等效物的高效合成利用了 N-
甲苯磺酰胺在反非对映选择性(8.5:1)
乙烯基格氏加成加纳
醛类似物中的立体定向效应。与 N-Boc Garner 醛相比,芳基和烷基
格氏试剂均显示出更高的抗选择性。