Cholinergic Agents: Effect of Methyl Substitution in a Series of Arecoline Derivatives on Binding to Muscarinic Acetylcholine Receptors
作者:Walter H. Moos、Stephen C. Bergmeier、Linda L. Coughenour、Robert E. Davis、Fred M. Hershenson、Jeffrey A. Kester、James S. McKee、John G. Marriott、Roy D. Schwarz、Haile Tecle、Anthony J. Thomas
DOI:10.1002/jps.2600811012
日期:1992.10
Arecoline, arecaidine, and a series of derivatives, differing by the presence or absence of methyl groups at positions on the periphery of the molecule, were prepared, and their binding to muscarinicacetylcholinereceptors was tested. On the basis of this study, muscarinic agonism for arecolineseries is governed by strict structure-activity relationships, as previously observed for other agonist
Enantioselective Synthesis of Dihydropyridines Containing Quaternary Stereocenters Through Dearomatization of Pyridinium Salts
作者:Donovan J. Robinson、Sean P. Spurlin、John D. Gorden、Rashad R. Karimov
DOI:10.1021/acscatal.9b03874
日期:2020.1.3
a fully substituted stereogenic center is a challenging synthetic problem. We describe a strategy toward this problem involving dearomatization of N-alkylpyridinium salts using boronic acid nucleophiles. This dearomatization reaction is catalyzed by a rhodium(I)/BINAP catalytic system and delivers dihydropyridines that contain a fully substituted stereogenic center alpha to the ring nitrogen atom in
作者:Graham A. Showell、Tracey L. Gibbons、Clare O. Kneen、Angus M. MacLeod、Kevin Merchant、John Saunders、Stephen B. Freedman、Shailendra Patel、Raymond Baker
DOI:10.1021/jm00107a032
日期:1991.3
Recent studies have described novel azabicycle-based muscarinicagonists which readily penetrate into the central nervous system and are capable of displaying high efficacy at cortical sites. The current paper describes the synthesis and biochemical assessment of semirigid muscarinic ligands which were used to map the requirements of the cortical muscarinic receptor and to study the degree of conformational