Synthesis and biological evaluation of new N-alkyl 1-aryl-5-(1H-pyrrol-1-yl)-1H-pyrazole-3-carboxamides as cannabinoid receptor ligands
摘要:
A series of N-alkyl 1-ary1-5-(1H-pyrrol-1-yl)-1H-pyrazole-3-carboxamides were synthesized as new ligands of the human recombinant receptor hCB(1). n-Alkyl carboxamides brought out different SARs from the branched subgroup. Unsubstituted pyrrole derivatives bearing a tert-alkyl chain at the 3-carboxamide nitrogen showed greater hCB1 receptor affinity than the corresponding unbranched compounds. In particular, the tert-butyl group as a chain terminal moiety strongly improved hCB(1) receptor affinity (compound 24: K-i; = 45.6 nM; 29: K-i = 37.5 nM). Acute administration of either compound 12 or 29 resulted in a specific, dose-dependent reduction in food intake in rats. Such results provide an useful basis for the design of new CB1 ligands. (C) 2010 Elsevier Masson SAS. All rights reserved.
Synthesis and biological evaluation of new N-alkyl 1-aryl-5-(1H-pyrrol-1-yl)-1H-pyrazole-3-carboxamides as cannabinoid receptor ligands
作者:Romano Silvestri、Alessia Ligresti、Giuseppe La Regina、Francesco Piscitelli、Valerio Gatti、Antonio Lavecchia、Antonella Brizzi、Serena Pasquini、Marco Allarà、Noemi Fantini、Mauro Antonio Maria Carai、Chiara Bigogno、Marco Giulio Rozio、Roberta Sinisi、Ettore Novellino、Giancarlo Colombo、Vincenzo Di Marzo、Giulio Dondio、Federico Corelli
DOI:10.1016/j.ejmech.2010.09.053
日期:2010.12
A series of N-alkyl 1-ary1-5-(1H-pyrrol-1-yl)-1H-pyrazole-3-carboxamides were synthesized as new ligands of the human recombinant receptor hCB(1). n-Alkyl carboxamides brought out different SARs from the branched subgroup. Unsubstituted pyrrole derivatives bearing a tert-alkyl chain at the 3-carboxamide nitrogen showed greater hCB1 receptor affinity than the corresponding unbranched compounds. In particular, the tert-butyl group as a chain terminal moiety strongly improved hCB(1) receptor affinity (compound 24: K-i; = 45.6 nM; 29: K-i = 37.5 nM). Acute administration of either compound 12 or 29 resulted in a specific, dose-dependent reduction in food intake in rats. Such results provide an useful basis for the design of new CB1 ligands. (C) 2010 Elsevier Masson SAS. All rights reserved.