Dynamic kinetic resolution of biaryl atropisomers by chiral dialkylaminopyridine catalysts
作者:Gaoyuan Ma、Chao Deng、Jun Deng、Mukund P. Sibi
DOI:10.1039/c8ob00384j
日期:——
The acylative dynamic kineticresolution (DKR) of configurationally unstable biaryl atropisomers is achieved by using newly developed chiral dialkylaminopyridine catalysts with fluxional chirality. Various types of biaryl substrates containing phenolic structures were subjected to the DKR to obtain a range of acylated biaryl products with enantiomeric ratios up to 90 : 10.
Discovery of <i>N</i>-{4-[(3-Hydroxyphenyl)-3-methylpiperazin-1-yl]methyl-2-methylpropyl}-4-phenoxybenzamide Analogues as Selective Kappa Opioid Receptor Antagonists
作者:Chad M. Kormos、Chunyang Jin、Juan Pablo Cueva、Scott P. Runyon、James B. Thomas、Lawrence E. Brieaddy、S. Wayne Mascarella、Hernán A. Navarro、Brian P. Gilmour、F. Ivy Carroll
DOI:10.1021/jm400275h
日期:2013.6.13
There is continuing interest in the discovery and development of new kappa opioid receptor antagonists. We recently reported that N-substituted 3-methyl-4-(3-hydroxyphenyl)piperazines were a new class of opioid receptor antagonists. In this study, we report the syntheses of two piperazine JDTic-like analogues. Evaluation of the two compounds in an in vitro [S-35]GTP gamma S binding assay showed that neither compound showed the high potency and kappa opioid receptor selectivity of JDTic. A library of compounds using the core scaffold 21 was synthesized and tested for their ability to inhibit [S-35]GTP gamma S binding stimulated by the selective kappa opioid agonist U69,593. These studies led to N-[(1S)-1-[(3S)-4-(3-hydroxyphenyl)-3-methylpiperazin-1-yl]methyll-2-methylpropyl]-4-phenoxybenzamide (11a), a compound that showed good kappa opioid receptor antagonist properties. An SAR study based on 11a provided 28 novel analogues. Evaluation of these 28 compounds in the [S-35]GTP gamma S binding assay showed that several of the analogues were potent and selective kappa opioid receptor antagonists.
[EN] 1-SUBSTITUTED 4-ARYLPIPERAZINE AS KAPPA OPIOID RECEPTOR ANTAGONISTS<br/>[FR] 4-ARYLPIPÉRAZINE 1-SUBSTITUÉ À TITRE D'ANTAGONISTE DU RÉCEPTEUR OPIOÏDE KAPPA