A highly efficient Pd–C catalytic hydrogenation of pyridine nucleus under mild conditions
作者:Chuanjie Cheng、Jimin Xu、Rui Zhu、Lixin Xing、Xinyan Wang、Yuefei Hu
DOI:10.1016/j.tet.2009.08.011
日期:2009.10
A synergistic Pd–C catalytic hydrogenation of 4-pyridinecarboxamides straightforward to 4-piperidinecarboxamide hydrochlorides was developed in the presence of ClCH2CHCl2. It provided a novel strategy for highlyefficient hydrogenation of pyridine nuclear by using low-cost Pd–C catalyst undermildconditions.
Electrochemical Aminoxyl-Mediated α-Cyanation of Secondary Piperidines for Pharmaceutical Building Block Diversification
作者:Alastair J. J. Lennox、Shannon L. Goes、Matthew P. Webster、Hannes F. Koolman、Stevan W. Djuric、Shannon S. Stahl
DOI:10.1021/jacs.8b08145
日期:2018.9.12
Secondary piperidines are ideal pharmaceutical building blocks owing to the prevalence of piperidines in commercial drugs. Here, we report an electrochemical method for cyanation of the heterocycle adjacent to nitrogen without requiring protection or substitution of the N-H bond. The reaction utilizes ABNO (9-azabicyclononane N-oxyl) as a catalytic mediator. Electrochemical oxidation of ABNO generates
[EN] COMPOUNDS USEFUL IN THE TREATMENT OF INFLAMMATORY DISEASES<br/>[FR] COMPOSES UTILISES DANS LE TRAITEMENT DE MALADIES INFLAMMATOIRES
申请人:GLAXO GROUP LTD
公开号:WO2000037444A1
公开(公告)日:2000-06-29
There are provided according to the invention, novel compounds of formula (I) wherein R?1, R2, R3, R4, R5 and R6¿ are as defined in the specification, processes for preparing them, formulations containing them and their use in therapy for the treatment of inflammatory diseases.