Room Temperature Cross-Coupling of Highly Functionalized Organozinc Reagents with Thiomethylated <i>N</i>-Heterocycles by Nickel Catalysis
作者:Laurin Melzig、Albrecht Metzger、Paul Knochel
DOI:10.1021/jo1001615
日期:2010.3.19
as pyridines, isoquinolines, pyrimidines, pyrazines, pyridazines, quinazolines, triazines, benzothiazoles, or benzoxazoles undergo smooth Ni-catalyzed cross-coupling reactions with functionalized aryl-, heteroaryl-, alkyl-, and benzylic zinc reagents using an inexpensive Ni(acac)2/DPE-Phos catalytic system at 25 °C.
Scaled-Up Transition-Metal-Catalyzed Cross-Coupling Reactions of Thioether-Substituted N-Heterocycles with Organozinc Reagents
作者:Paul Knochel、Albrecht Metzger、Laurin Melzig
DOI:10.1055/s-0030-1258145
日期:2010.8
A variety of functionalized methylthio-substituted N-heterocycles (pyridines, pyrimidines, pyrazines, pyridazines, triazines, quinazolines, benzothiazoles) undergo smooth palladium- or nickel-catalyzed cross-couplings with highlyfunctionalized organozinc reagents at ambient temperature. No expensive copper(I) salts are required and the coupling reactions proceed readily in the range of up to 20 mmol