Oxidative functionalization of benzylic C–H bonds by DDQ
作者:Victor S. Batista、Robert H. Crabtree、Steven J. Konezny、Oana R. Luca、Jeremy M. Praetorius
DOI:10.1039/c2nj40021a
日期:——
C–H activation of the methyl group of toluene and related ArCH3 derivatives by 2,3-dichloro-4,5-dicyano-1,4-benzoquinone (DDQ) gives insertion products, ArCH2O[C6Cl2(CN)2]OH via a rate-determining hydride abstraction by DDQ. The resulting benzylic ether can undergo reactions with phosphines to give benzylic phosphonium salts (Wittig reagents) and with phosphites to give phosphonate esters (Horner–Wadsworth–Emmons
C–H活化甲基 甲苯和相关的拱3个由2,3-二氯-4,5-二氰基-1,4-苯醌衍生物(DDQ)使插入产品,ARCH 2 O [C 6氯2(CN)2 ] OH经由速率决定氢化DDQ进行抽象。生成的苄基醚可与膦反应生成苄基phospho盐(Wittig试剂),与亚磷酸酯生成膦酸酯(Horner–Wadsworth–Emmons试剂)。