Palladium(II)-Catalyzed Oxidative C–H/C–H Coupling and Eliminative S<sub>N</sub><sup>H</sup> Reactions in Direct Functionalization of Imidazole Oxides with Indoles
作者:Mikhail V. Varaksin、Irina A. Utepova、Oleg N. Chupakhin、Valery N. Charushin
DOI:10.1021/jo301618b
日期:2012.10.19
Two novel synthetic approaches to realize the direct C(sp2)–H bond functionalization in cyclic nitrones are reported. Palladium(II)-catalyzed oxidative C–C coupling of 2,2-dialkyl-4-phenyl-2H-imidazole 1-oxides with indoles was shown to result in the formation of 5-indolyl-3-yl derivatives, while nucleophilic substitution of hydrogen (SNH) at C(5) of the same imidazole system was found to afford the
两种新颖的合成方法,以实现在环硝酮中直接C(sp 2)-H键功能化。钯(II)催化的2,2-二烷基-4-苯基-2 H-咪唑1-氧化物与吲哚的氧化性CC偶联导致形成5-吲哚基-3-基衍生物,而亲核的氢(S取代ñ ħ在同一咪唑系统的C(5))被发现,得到相应的脱氧化合物。