Cholecystokinin peptidomimetics as selective CCK-B antagonists: Design, synthesis, and in vitro and in vivo biochemical properties
摘要:
Antagonists of cholecystokinin-B (CCK-B) receptors have been shown to alleviate CCK4-induced panic attacks in humans and to potentiate opioid effects in animals. The clinical use of these compounds is critically dependent on their ability to cross the blood-brain barrier. In order to improve this property, new, peptoid-derived CCK-B antagonists, endowed with high affinity, selectivity, and increased lipophilicity have been developed. The affinity and selectivity of these compounds have been characterized in vitro and in vivo using guinea pig, rat, and mouse. Most of these compounds proved to be selective for the CCK-B receptor, the most potent analog, N-[N-[(2-adamantyloxy)carbonyl]-D-alpha-methyltryptophanyl]-N-[2-(4-chlorophenyl)ethyl]glycine (26A), having a K(i) value of 6.1 nM for guinea pig cortex membranes in vitro and a good selectivity ratio (K(i) CCK-A/K(i) CCK-B = 174). Furthermore, the in vivo affinity of 26A for mouse brain CCK-B receptors, following intracerebroventricular injection at different concentrations, was found to be 10 nmol. Using competition experiments with the specific CCK-B ligand [H-3]pBC 264, compound 26A was shown to cross the blood-brain barrier (0.2%) after intraperitoneal administration in mice. This compound is therefore an interesting pharmacological tool to further elucidate the physiopathological role of endogenous CCK.
Copper(<scp>ii</scp>)-catalyzed oxidative [3+2] cycloaddition reactions of secondary amines with α-diazo compounds: a facile and efficient synthesis of 1,2,3-triazoles
作者:Yi-Jin Li、Xue Li、Shao-Xiao Zhang、Yu-Long Zhao、Qun Liu
DOI:10.1039/c5cc02092a
日期:——
A novel copper-catalyzed [3+2] cycloaddition reaction of secondary amines with α-diazo compounds has been developed via a cross-dehydrogenative coupling process under very mild conditions with molecular oxygen as a co-oxidant.
Cholecystokinin peptidomimetics as selective CCK-B antagonists: Design, synthesis, and in vitro and in vivo biochemical properties
作者:Armand G. S. Blommaert、Jian Hui Weng、Agnes Dorville、Isabelle McCort、Bertrand Ducos、Christine Durieux、Bernard P. Roques
DOI:10.1021/jm00072a005
日期:1993.10
Antagonists of cholecystokinin-B (CCK-B) receptors have been shown to alleviate CCK4-induced panic attacks in humans and to potentiate opioid effects in animals. The clinical use of these compounds is critically dependent on their ability to cross the blood-brain barrier. In order to improve this property, new, peptoid-derived CCK-B antagonists, endowed with high affinity, selectivity, and increased lipophilicity have been developed. The affinity and selectivity of these compounds have been characterized in vitro and in vivo using guinea pig, rat, and mouse. Most of these compounds proved to be selective for the CCK-B receptor, the most potent analog, N-[N-[(2-adamantyloxy)carbonyl]-D-alpha-methyltryptophanyl]-N-[2-(4-chlorophenyl)ethyl]glycine (26A), having a K(i) value of 6.1 nM for guinea pig cortex membranes in vitro and a good selectivity ratio (K(i) CCK-A/K(i) CCK-B = 174). Furthermore, the in vivo affinity of 26A for mouse brain CCK-B receptors, following intracerebroventricular injection at different concentrations, was found to be 10 nmol. Using competition experiments with the specific CCK-B ligand [H-3]pBC 264, compound 26A was shown to cross the blood-brain barrier (0.2%) after intraperitoneal administration in mice. This compound is therefore an interesting pharmacological tool to further elucidate the physiopathological role of endogenous CCK.
Discovery and Structure−Activity Relationship of (1<i>R</i>)-8-Chloro-2,3,4,5-tetrahydro-1-methyl-1<i>H</i>-3-benzazepine (Lorcaserin), a Selective Serotonin 5-HT<sub>2C</sub> Receptor Agonist for the Treatment of Obesity
作者:Brian M. Smith、Jeffrey M. Smith、James H. Tsai、Jeffrey A. Schultz、Charles A. Gilson、Scott A. Estrada、Rita R. Chen、Douglas M. Park、Emily B. Prieto、Charlemagne S. Gallardo、Dipanjan Sengupta、Peter I. Dosa、Jon A. Covel、Albert Ren、Robert R. Webb、Nigel R. A. Beeley、Michael Martin、Michael Morgan、Stephen Espitia、Hazel R. Saldana、Christina Bjenning、Kevin T. Whelan、Andrew J. Grottick、Frederique Menzaghi、William J. Thomsen
DOI:10.1021/jm0709034
日期:2008.1.1
The synthesis and SAR of a novel 3-benzazepine series of 5-HT2Cagonists is described. Compound 7d (lorcaserin, APD356) was identified as one of the more potent and selective compounds in vitro (pEC50 values in functional assays measuring [(3)H]phosphoinositol turnover: 5-HT2C = 8.1; 5-HT2A = 6.8; 5-HT2B = 6.1) and was potent in an acute in vivo rat food intake model upon oral administration (ED50