Selective palladium-catalysed amination of 4-chloropyridines with benzylamines using the Josiphos ligand
作者:Janet L. Hawkins、Clare L. Gregson、Lorraine A. Hassall、Jane L. Holmes
DOI:10.1016/j.tetlet.2014.09.115
日期:2014.12
A synthetic strategy for the synthesis of a library of 4-N-benzylamino-2-N-phenyl-pyridines is herein described. The approach involves a Pd-assisted cross-coupling of a 4-chloro-N-phenylpyridin-2-amine intermediate with a range of benzylamines. A variety of ligands were screened, the most successful being the Josiphos ligand, which gave the desired products in good to moderate yields. The reactions occur quickly, within 30 mm, with full conversion of the intermediate into the desired product. (C) 2014 Elsevier Ltd. All rights reserved.