Controlling chemoselective transformations of 4-acylpyridines via a Pd–C catalytic hydrodechlorination–hydrogenation
摘要:
A novel Pd-C catalytic hydrodechlorination-hydrogenation was developed for a multi-step one-pot transformation of 4-acylpyridines. Under the selected conditions, 4-benzoylpyridines and 4-alkanoylpyridines were chemoselectively converted into the corresponding 4-benzylpiperidine hydrochlorides and alpha-alkyl-4-piperidinemethanol hydrochlorides, respectively. This catalytic method was performed simply by an addition of 1 equiv of CICH2CHCl2 to the conventional hydrogenation system and directly gave the crystalline piperidine hydrochlorides in practical quantitative yields. (C) 2013 Elsevier Ltd. All rights reserved.
Structure activity relationships leading to the identification of the indirect activator of AMPK, R419
作者:Simon J. Shaw、Dane A. Goff、David C. Carroll、Rajinder Singh、David J. Sweeny、Gary Park、Yonchu Jenkins、Vadim Markovtsov、Tian-Qiang Sun、Sarkiz D. Issakani、Yasumichi Hitoshi、Donald G. Payan