cobalt‐catalyzed arylation of benzyl chlorides has been developed in order to form functionalized diarylmethanes. A variety of reactive groups either on the aryl or the benzyl halide was employed. This represents the first cobalt‐catalyzed reductive cross‐coupling which does not require any ligand and pyridine. A reaction pathway is proposed involving a radical benzyl species.
Expanding the limit of Pd-catalyzed decarboxylative benzylations
作者:Duanyang Kong、Patrick J. Moon、Wenyu Qian、Rylan J. Lundgren
DOI:10.1039/c8cc02380h
日期:——
The Pd-catalyzed decarboxylative cross-coupling of electron-deficient aryl acetates with arylbromides is reported. The method widens the scope of benzylic partners that can undergo efficient reactivity from highly activated nitrophenylacetates established previously, to a diverse series of substrates bearing modestly stabilizing groups, allowing direct access to functionalized diarylmethanes. Mechanistic
Cross-couplings between benzylic and aryl halides “on water”: synthesis of diarylmethanes
作者:Christophe Duplais、Arkady Krasovskiy、Alina Wattenberg、Bruce H. Lipshutz
DOI:10.1039/b922280d
日期:——
A remarkably simple entry to unsymmetrical diarylmethanes has been developed that relies on an in situ organozinc-mediated, palladium-catalyzed cross-coupling. Thus, by mixing a benzyl and aryl halide together in the presence of Zn metal and a Pd catalyst, diarylmethanes are formed at room temperature without assistance by a surfactant; hence, "on water".