[EN] PIPERIDINYL- AND PIPERAZINYL-SUBSTITUTED HETEROAROMATIC CARBOXAMIDES AS MODULATORS OF GPR6 [FR] CARBOXAMIDES HÉTÉROAROMATIQUES SUBSTITUÉS PAR PIPÉRIDINYLE ET PIPÉRAZINYLE EN TANT QUE MODULATEURS DE GPR6
Facile One-Pot Synthesis of N-Difluoromethyl-2-pyridone Derivatives
摘要:
A novel one-pot synthesis of N-difluoromethyl-2-pyridones is described. N-(Pyridin-2-yl) acetamide derivatives were excellent precursors for the preparation of N- difluoromethyl-2-pyridone derivatives. Difluoromethylation of 2-acetaminopyridine derivatives was achieved with sodium chlorodifluoroacetate as a difluorocarbene source in the presence of a catalytic amount of 18-crown-6. Subsequent in situ hydrolysis of resultant 1,2-dihydro-2-acetimino-1-difluoromethylpyridines proceeded under mild acidic conditions to afford the corresponding N-difluoromethyl-2-pyridones in moderate to good yields.
[EN] Amide compounds and uses thereof<br/>[FR] COMPOSÉS AMIDES ET LEURS UTILISATIONS
申请人:HUTCHISON MEDIPHARMA LTD
公开号:WO2021197276A1
公开(公告)日:2021-10-07
Provided herein are novel amide compounds of formula (I), pharmaceutical compositions comprising same, methods for preparing same, and uses thereof, wherein the definition of each symbol is as described in the description.