Unified Protocol for Cobalt-Catalyzed Oxidative Assembly of Two Aryl Metal Reagents Using Oxygen as an Oxidant
作者:Lian-Yan Liao、Kun-Ming Liu、Xin-Fang Duan
DOI:10.1021/acs.joc.5b01787
日期:2015.10.16
reaction of two aryl metal reagents is described. An equivalent amount of two arylGrignard or lithium reagents, after mediation by an equivalent amount of simple ClTi(OEt)3, was facilely assembled under the catalysis of 1 mol % of CoCl2/10 mol % of DMPU using oxygen. The cross-couplings between various aryl metal reagents, especially between two structurally similar arylGrignardreagents, proceeded smoothly
Synthesis of 4-oxazolinephenylboronic acid and heterobiaryl oxazolines via a Suzuki Reaction
作者:Samir Ghosh、A. Sanjeev Kumar、G.N. Mehta、R. Soundararajan、Subhabrata Sen
DOI:10.3184/030823409x431355
日期:2009.4
An efficient synthesis of 4-oxazolinephenylboronic acid from 4-bromobenzoic acid is reported. The title compound couples with heteroaryl halides in presence of Pd(PPh3)4 and Na2CO3 in aqueous toluene to give heterobiaryl oxazolines.