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
Indium powder as the reducing agent in the synthesis of 2-amino-1,1′-biphenyls
作者:Vijayaragavan Elumalai、Hans-René Bjørsvik
DOI:10.1016/j.tetlet.2016.02.007
日期:2016.3
is disclosed. The method utilizes only a stoichiometric quantity of indium powder as the reducing reagent along with a stoichiometric quantity of ammonium chloride. The work-up is very simple, it requires only a simple filtration of the post-reaction mixture whereupon the reaction medium is removed under reduced pressure. The method was also proven to operate with a variety of functional groups to provide