Methylated Analogues of Methyl (<i>R</i>)-4-(3,4-Dichlorophenylacetyl)- 3-(pyrrolidin-1-ylmethyl)piperazine-1-carboxylate (GR-89,696) as Highly Potent κ-Receptor Agonists: Stereoselective Synthesis, Opioid-Receptor Affinity, Receptor Selectivity, and Functional Studies
作者:Stella Soukara、Christoph A. Maier、Ursula Predoiu、Andreas Ehret、Rolf Jackisch、Bernhard Wünsch
DOI:10.1021/jm0108395
日期:2001.8.1
Analogues of the kappa-receptor agonist methyl (R)-4-(3,4-dichlorophenylacetyl)-3-(pyrrolidin-1-ylmethyl)piperazine-1-carboxylate (GR-89,696, 6) bearing an additional methyl substituent in the side chain are synthesized and evaluated for their kappa-receptor affinity and selectivity. A key step in the synthesis is the stereoselective reductive amination of the ketones 9, 18, and 19 with pyrrolidine