Iridium-Catalyzed Enantioselective Direct α-C–H Alkylation of Saturated Cyclic Amines with Alkenes
作者:Daisuke Yamauchi、Kentaro Yamakawa、Takahiro Nishimura
DOI:10.1021/acs.orglett.2c02733
日期:2022.9.23
Enantioselective direct α-C(sp3)–H alkylation of saturated cyclic amines having N-methylbenzimidazolyl as a directing group was realized by using a cationic iridium/chiral diphosphine catalyst. The alkylation of pyrrolidine derivatives with various terminal alkenes proceeded to give α-alkylated products in high yields with high enantioselectivities. Chiral α,α′-dialkylated pyrrolidine derivatives were
通过使用阳离子铱/手性二膦催化剂实现了以N-甲基苯并咪唑基为导向基团的饱和环胺的对映选择性直接α-C(sp 3 )-H 烷基化。吡咯烷衍生物与各种末端烯烃的烷基化继续以高产率和高对映选择性得到α-烷基化产物。还通过使用过量烯烃或通过逐步烷基化来合成手性 α,α'-二烷基化吡咯烷衍生物。