strategy has been extended to cyclic amines. The basis for the CEC approach is the use of two complementary, enantioselective reactions to determine the configuration of the enantiopure substrate. Bode’s chiral acylated hydroxamic acids are very effective enantioselective acylating agents for a variety of amines. Pseudoenantiomers of these acyl-transfer reagents were prepared and demonstrated to react with
竞争对映选择性转化(C
EC)策略已扩展到环胺。C
EC方法的基础是使用两个互补的对映选择性反应来确定对映纯底物的构型。鲍德的手性酰化异羟
肟酸是对多种
胺类非常有效的对映选择性酰化剂。制备了这些酰基转移试剂的伪对映体,并证明它们与对映纯环胺具有中等至高选择性的反应。通过ESI-MS分析产物以确定选择性,并将结果用于指定胺底物的构型。该方法适用于各种环胺以及
伯胺和无环仲胺。该方法仅限于不受阻碍足以与试剂反应的胺,