Conversion of 4-cyanomethyl-pyrazole-3-carboxamides into CB1 antagonists with lowered propensity to pass the blood–brain-barrier
作者:Jean-Marie Receveur、Anthony Murray、Jean-Michel Linget、Pia K. Nørregaard、Martin Cooper、Emelie Bjurling、Peter Aadal Nielsen、Thomas Högberg
DOI:10.1016/j.bmcl.2009.12.003
日期:2010.1
A series of amides, amidines and amidoximes have been made from the corresponding nitrile compounds, to provide potent antagonists and inverse agonists for the CB1 receptor with considerably lower lipophiliciy, higher polar surface area and improved plasma/brain ratios compared to the centrally acting rimonabant. Extensive investigations of ADME and in vivo pharmacological properties led to selection of the amide series and specifically the 4-(4-fluorophenyl)piperidin-4-ol derivative D4. A clear improvement in the peripheral pro. le over rimonabant was seen, although some contribution of central effect on the pronounced weight reduction in obese mice cannot be ruled out. (C) 2009 Elsevier Ltd. All rights reserved.