Peroxide-Free Pd(II)-Catalyzed Ortho Aroylation and Ortho Halogenation of Directing Arenes
作者:Sourav Kumar Santra、Arghya Banerjee、Prakash Ranjan Mohanta、Bhisma K. Patel
DOI:10.1021/acs.joc.6b01170
日期:2016.7.15
A Pd(II)-catalyzed peroxide-free ortho aroylation of directing arenes has been developed via cross dehydrogenative coupling (CDC) in the presence of the terminal oxidant Cu(OAc)2·H2O. Ortho aroylation of directing arenes proceeds via decarbonylation of the in situ generated phenyl glyoxal, which is obtained from 2-acetoxyacetophenone in the presence of the oxidant Cu(OAc)2·H2O. However, changing the
在末端氧化剂Cu(OAc)2 ·H 2 O存在下,通过交叉脱氢偶联(CDC)开发了Pd(II)催化的无氧芳烃直接芳烃芳烃化。原位产生的苯基乙二醛,这是从2-乙酸基苯乙酮于氧化剂的Cu(OAc)的存在下获得的2 ·H 2 O.然而,改变氧化剂的CuX 2(X =氯,溴)独家提供二邻卤化的2-芳基苯并噻唑。在卤化过程中,CuX 2兼具卤素源和助氧化剂的双重作用。