Iridium-Catalyzed Intermolecular Amidation of sp3 C–H Bonds: Late-Stage Functionalization of an Unactivated Methyl Group
摘要:
Reported herein is the iridium-catalyzed direct amidation of unactivated sp(3) C-H bonds. With sulfonyl and acyl azides as the amino source, the amidation occurs efficiently under mild conditions over a wide range of unactivated methyl groups with high functional group tolerance. This procedure can be successfully applied for the direct introduction of an amino group into complex compounds and thus can serve as a powerful synthetic tool for late-stage C-H functionalization.
Directingstrategy has been extensively exploited to maintain activity and selectivity for the rapid access to functionalized molecules and pharmaceutical targets. However, ‘one‐to‐one’ activation model was usually achieved through traditional directingstrategy. Herein, we achieved ‘one‐to‐two’ activation model by slight modification of simple and practical ketoxime and amide functionality. With judicious
Rhodium(III)-Catalyzed Activation of C sp 3H Bonds and Subsequent Intermolecular Amidation at Room Temperature
作者:Xiaolei Huang、Yan Wang、Jingbo Lan、Jingsong You
DOI:10.1002/anie.201504507
日期:2015.8.3
Disclosed herein is a RhIII‐catalyzed chelation‐assisted activation of unreactive CH bonds, thus enabling an intermolecular amidation to provide a practical and step‐economic route to 2‐(pyridin‐2‐yl)ethanamine derivatives. Substrates with other N‐donor groups are also compatible with the amidation. This protocol proceeds at roomtemperature, has a relatively broad functional‐group tolerance and high