Synthesis and SAR of novel imidazoles as potent and selective cannabinoid CB2 receptor antagonists with high binding efficiencies
作者:Jos H.M. Lange、Martina A.W. van der Neut、Henri C. Wals、Gijs D. Kuil、Alice J.M. Borst、Arie Mulder、Arnold P. den Hartog、Hicham Zilaout、Wouter Goutier、Herman H. van Stuivenberg、Bernard J. van Vliet
DOI:10.1016/j.bmcl.2009.12.032
日期:2010.2
The synthesis and structure–activity relationship studies of imidazoles are described. The target compounds 6–20 represent a novel chemotype of potent and CB2/CB1 selective cannabinoidCB2receptor antagonists/inverse agonists with veryhigh binding efficiencies in combination with favourable log P and calculated polar surface area values. Compound 12 exhibited the highest CB2receptoraffinity (Ki = 1
A Pd-catalyzed enantio selective synthesis of quaternary alpha-amino acid derivatives using a phenylalanine-derived P-chirogenic diaminophosphine oxide is described. Asymmetric allylic substitution using acyclic beta-keto esters with a nitrogen functional group at the alpha-carbon as prochiral nucleophiles proceeded in the presence of 5 mol % of Pd catalyst, 10 mol % of chiral diaminophosphine oxide 1j, BSA, and appropriate additives, affording the corresponding quaternary alpha-amino acid derivatives in excellent yield and in up to 92% ee. (c) 2007 Elsevier Ltd. All rights reserved.
Catalytic Asymmetric Allylation of Prochiral Nucleophiles, α-Acetamido-β-ketoesters