Autoxidative sp3 C–H transformation of diarylmethanes has been demonstrated using O2-mediation by t-BuONa. This protocol enables an alternative route for the access to diaryl ketones from benzyl derivatives in good to excellent yields under mild reaction conditions, without transition metal catalysts or additional chemical oxidants.
Tetraethylammonium iodide catalyzed synthesis of diaryl ketones via the merger of cleavage of C–C double bonds and recombination of aromatic groups
作者:Xianghua Zeng、Daqian Xu、Chengxia Miao、Chungu Xia、Wei Sun
DOI:10.1039/c4ra08764j
日期:——
An efficient method for synthesizing diaryl ketones via merging of oxidative cleavage of C–C doublebonds and recombination of aromatic groups is developed with Et4NI (2.5 mol%) as the catalyst and NaIO4 as the oxidant. The control experiments provide valuable mechanistic insights into the formation of diaryl ketones, and suggest that NaIO4 serves as an epoxidation and nucleophilic deformylation reagent
Ionically tagged benzimidazole palladium(II) complex: preparation and catalytic application in cross-coupling reactions
作者:Li Zhang、Junliang Wu、Lijun Shi、Chungu Xia、Fuwei Li
DOI:10.1016/j.tetlet.2011.05.079
日期:2011.7
An imidazolium chloride tagged palladium(II) complex has been conveniently prepared and structurally analyzed. It is active toward cross-coupling of arylboronic acid with aryl halide and benzoylchloride, giving moderate to high yield of the desired biaryls and aryl ketones, respectively. The present phosphine-free (N–N)Pd(II) complex could be efficiently recycled at least four times with minor decrease
Catalytic Friedel-Crafts acylation of benzene, chlorobenzene, and fluorobenzene using a novel catalyst system, hafnium triflate and trifluoromethanesulfonic acid
作者:Shū Kobayashi、Shunsuke Iwamoto
DOI:10.1016/s0040-4039(98)00881-8
日期:1998.6
Catalytic Friedel-Crafts acylation of benzene and unactivated benzenes such as chlorobenzene and fluorobenzene has been successfully carried out using hafnium (IV) triflate and trifluoromethanesulfonic acid as catalysts. Both aromatic and aliphatic carboxylic acid chlorides reacted smoothly under the conditions to afford the corresponding aromatic ketones in good yields.
Transition-metal-free, ambient-pressure carbonylative cross-coupling reactions of aryl halides with potassium aryltrifluoroborates
作者:Fengli Jin、Wei Han
DOI:10.1039/c5cc01968k
日期:——
We disclose an unprecedented transition-metal-free carbonylative cross coupling of arylhalides with potassium aryl trifluoroborates even at atmospheric pressure of carbon monoxide. This protocol is efficient, operationally simple, and shows...