Cp*Co(III)-catalyzed (Cp*=pentamethylcyclopentadienyl) C–H bond functionalization of 6-arylpurines using gem-difluoroalkenes and allyl fluorides is described. The reaction with gem-difluoroalkenes afforded monofluoroalkenes with high (Z)-selectivity, while the reaction with allyl fluorides led to C–H allylation in moderate (Z)-selectivity. Both reactions proceeded using a user-friendly single-component catalyst [Cp*Co(CH3CN)3](SbF6)2 in fluorinated alcohol solvents without any additives. Robustness was also demonstrated by a preparative-scale reaction under air.
本研究描述了 Cp*Co(III)-catalyzed (Cp*=pentamethylcyclopentadienyl) C-H bond functionalization of 6-arylpurines using gem-difluoroalkenes and allyl fluorides。与宝石二
氟烯烃的反应以高 (Z) 选择性生成单
氟烯烃,而与烯丙基
氟化物的反应则以中等 (Z) 选择性生成 C-H 烯丙基化。这两个反应都是使用方便的单组分催化剂 [Cp*Co(CH3CN)3](SbF6)2,在
氟化醇溶剂中进行的,没有使用任何添加剂。在空气中进行的制备规模反应也证明了其稳定性。