The diastereoselective nucleophilic (phenylsulfonyl)difluoromethylation and (phenylsulfonyl)monofluoromethylation of α-amino N-tert-butanesulfinimines (3) by using PhSO2CF2H and PhSO2CH2F reagents gave products 4 or 5 in high yields (73−99%) and with excellent diastereoselectivity (dr up to >99:1). After subsequent reductive desulfonylation and acid-catalyzed alcoholysis, compounds 4 and 5 could be
通过使用PhSO 2 CF 2 H和PhSO 2 CH 2 F试剂对α-
氨基N-叔
丁烷亚
磺胺(3)进行非对映选择性亲核(苯磺酰基)二
氟甲基化和(苯磺酰基)单
氟甲基化,可以高收率得到产物4或5(73-99) %)并具有出色的非对映选择性(dr高达> 99:1)。在随后的还原性脱磺酰化和酸催化的醇解之后,化合物4和5可以容易地以良好的产率转化为手性α-二
氟甲基化或α-单
氟甲基化的
乙二胺。