Enantioselective Synthesis of Nicotinic Receptor Probe 7,8-Difluoro-1,2,3,4,5,6- hexahydro-1,5-methano-3-benzazocine
摘要:
The development of a concise enantioselective synthesis of nicotinic alkaloid 1 is presented. The route features the synthesis and use of a "stable" aliphatic triflate 21 in an alkylation step to generate Heck precursor 24 and an enantioselective cyclization to establish a compound with the key [ 3.2.1]- bicyclic core, 29.
In pursuit of α4β2 nicotinic receptor partial agonists for smoking cessation: Carbon analogs of (−)-cytisine
摘要:
The preparation and biological activity of analogs of (-)-cytisine, an alpha 4 beta 2 nicotinic receptor partial agonist, are discussed. All-carbon-containing phenyl ring replacements of the pyridone ring system, generated via Heck cyclization protocols, exhibited weaker affinity and lower efficacy partial agonist profiles relative to (-)-cytisine. In vivo, selected compounds exhibit lower efficacy partial agonist profiles than that of (-)-cytisine. (c) 2005 Elsevier Ltd. All rights reserved.
The present invention relates to compounds of formula (I)
and their pharmaceutically acceptable salts, wherein R1, R2, R3 and Z are as defined herein, intermediates in the synthesis of such compounds, pharmaceutical compositions containing such compounds and methods of using such compounds in the treatment of neurological and psychological disorders.