Palladium(II)-Catalyzed Direct ortho-CH Acylation of Anilides by Oxidative Cross-Coupling with Aldehydes using tert-Butyl Hydroperoxide as Oxidant
作者:Chun-Wo Chan、Zhongyuan Zhou、Wing-Yiu Yu
DOI:10.1002/adsc.201100472
日期:2011.11
An efficient palladium-catalyzed CH acylation with aldehydes using tert-butyl hydroperoxide (TBHP) transforms various anilides into synthetically useful 2-aminobenzophenone derivatives under mild conditions (40 °C, 3 h). The acylation reaction exhibits excellent regioselectivity and functional group tolerance, and simple aromatic aldehydes, functionalized aliphatic aldehydes and heteroaromatic aldehydes
使用叔丁基氢过氧化物(TBHP)进行的钯与醛的有效CH酰化CH酰化反应可在温和条件下(40°C,3 h)将各种酸酐转化为合成有用的2-氨基二苯甲酮衍生物。酰化反应显示出优异的区域选择性和官能团耐受性,简单的芳族醛,官能化的脂族醛和杂芳族醛是有效的偶联伙伴。酰化反应可能是通过限速亲电CH环钯反应(k H / k D = 3.6;ρ + = -0.74)引发,形成芳基钯配合物,然后进行酰基自由基官能化。