A Pd-catalyzed directed chlorination of unactivatedC(sp3)–H bonds has been developed. By using the bidentate 8-aminoquinolinyl directing group, selective chlorination of aliphatic amides has been achieved in moderate to good yields at room temperature in the presence of N-chlorosuccinimide (NCS). This approach offers access to valuable chlorinated molecules, key building blocks for bulk and fine chemical
C–N and C–O Bond Formation in Copper-Catalyzed/Mediated sp<sup>3</sup> C–H Activation: Mechanistic Studies from Experimental and Computational Aspects
作者:Yuhang Yang、Fei Cao、Linbin Yao、Tao Shi、Bencan Tang、Yoichiro Kuninobu、Zhen Wang
DOI:10.1021/acs.joc.0c01038
日期:2020.8.7
studies on Cu-catalyzed/mediated sp3 C–Hamidation and acetoxylation are investigated from experimental and computational aspects. The concerted metalation–deprotonation (CMD) mechanism rather than a radical-involved pathway is proved to occur in amidation and acetoxylation reactions, and this is the rare example of the CMD mechanism involved in the more challenging sp3 C–H activations. Theoretical calculations