Pd(II)-Catalyzed Direct <i>ortho</i>-C–H Acylation of Aromatic Ketones by Oxidative Decarboxylation of α-Oxocarboxylic Acids
作者:Pui-Yiu Lee、Peiwen Liang、Wing-Yiu Yu
DOI:10.1021/acs.orglett.7b00677
日期:2017.4.21
A Pd-catalyzed decarboxylative acylation of aromaticketones with α-oxocarboxylic acids was developed, and 1,2-diacylbenzenes were formed in up to 90% yield with excellent ortho-selectivity. This work demonstrates the first successful attempt to direct C–H acylation of aromaticketones without the need for prederivatization to imines. The acylation reaction was inhibited by radical scavengers such
Cobalt-Catalyzed, N–H Imine-Directed Arene C–H Benzylation with Benzyl Phosphates
作者:Roshayed Ali Laskar、Naohiko Yoshikai
DOI:10.1021/acs.joc.9b01775
日期:2019.10.18
ortho-C-H benzylation reaction of pivalophenone N-H imines with benzyl phosphates is reported. The reaction is promoted at room temperature by a ternary catalytic system comprising Co(acac)3, a pyridylphosphine ligand, and a Grignard reagent and tolerates a series of substituted pivalophenone imines and benzyl phosphates to afford various diarylmethane derivatives in moderate yields.