Synthesis of the Carbazole Scaffold Directly from 2-Aminobiphenyl by Means of Tandem C-H Activation and C-N Bond Formation
作者:Hans-René Bjørsvik、Vijayaragavan Elumalai
DOI:10.1002/ejoc.201601191
日期:2016.11
An efficient method for the synthesis of the carbazolescaffold was designed and investigated. The method was developed to produce substituted carbazoles by an intramolecular combination of a free amine group and an arene. The steps of the method involved tandem Pd-catalyzed C–Hactivation and intramolecular C–Nbondformation. The method showed good functional group tolerance, and substituent(s) could
A Highly Efficient Pd(PPh<sub>3</sub>)<sub>4</sub>-Catalyzed Suzuki Cross-Coupling Method for the Preparation of 2-Nitrobiphenyls from 1-Chloro-2-nitrobenzenes and Phenylboronic Acids
作者:Vijayaragavan Elumalai、Alexander H. Sandtorv、Hans-René Bjørsvik
DOI:10.1002/ejoc.201501487
日期:2016.3
A simple and efficientmethod for Suzuki cross-coupling of highly substituted and congested 1-chloro-2-nitrobenzene with phenylboronic acid was developed, investigated, and optimized. The reaction conditions comprises a mixture of MeOH and water (4:1) as the reaction medium, readily available and cheap Pd(PPh3)4 as catalyst, sodium carbonate as base, and microwave heating, which affords a fast reaction