A highly efficient palladium-catalyzed arylation of azoles at the C2-position using 1-aryltriazenes as aryl reagents was developed. Azoles including oxazoles, thiazoles, imidazoles, 1,3,4-oxadiazoles, and oxazolines could react with 1-aryltriazenes smoothly to generate the corresponding products in good to excellent yields, and various substitution patterns were tolerated toward the reaction.
(N-heterocyclic carbene)PdCl(N-heterocyclic carboxylate) complexes: Synthesis and catalytic activities towards arylation of benzoxazoles with aryl halides
作者:Jin Yang
DOI:10.1002/aoc.4394
日期:2018.7
A series of N‐heterocyclic carboxylate‐stabilized N‐heterocycliccarbene palladium complexes have been synthesized and fully characterized. The solid‐state structures indicate that each of the palladium centers is coordinated by an N‐heterocycliccarbene, a chloride and a bidentate N,O‐donorN‐heterocyclic carboxylate ligand. The catalytic performance of the complexes was screened and the results revealed
Nano‐magnetitesupportedN‐heterocycliccarbene‐coppercomplex with wingtipferrocene has been prepared via multi‐step procedure. The complex has been characterized by various analytical techniques such as fourier transform infrared (FT‐IR), fourier transform Raman (FT‐Raman), X‐ray photoelectron spectroscopy (XPS), X‐ray diffraction (XRD), transmission electron microscopy (TEM) and vibrating sample
EFFICIENT ONE-POT SYNTHESIS OF BENZOXAZOLE DERIVATIVES CATALYZED BY NICKEL SUPPORTED SILICA
作者:SURESH MADDILA、SREEKANTH. B JONNALAGADDA
DOI:10.4067/s0717-97072012000200008
日期:——
efficient method has been developed for the synthesis of benzoxazoles from 2-aminophenol and substituted aldehydes in the presence of a catalytic amount of nickel supported silica at room temperature. . Two protocols for the synthesis of benzoxazoles have been developed. One is the copper-catalyzed intramolecular o-arylations or intermolecular dominoannulations of o-arylhalides 2-4 and the other is the