Syntheses of benzoquinolizidine and benzoindolizidine derivatives as anti-amnesic agents
摘要:
Tacrine, one of the drugs available for Alzheimer's disease based on the cholinergic approach, suffers from considerable toxicity. Many analogues of tacrine have been prepared which retain the pharmacologically rich aminopyridine or aminoquinoline motifs. The current research was undertaken to produce an acetylcholinesterase inhibitor by employing 11-aminobenzoquinolizidines (4) and 10-aminobenzoindolizidines (5) as templates. Thus, we aimed to achieve three goals relative to tacrine: eliminate the pyridine and quinoline moieties and render the molecule less flat. Overall, the compounds we prepared were poorer inhibitors of acetylcholinesterase compared to tacrine. The single exception was compound 6f which exhibited an effect comparable to that of tacrine, but only at a dose of the order of 10(-3) M. However, despite the poor acetylcholinesterase inhibition by 6b, this compound proved to be an effective anti-amnesic agent at 45 mg/kg dose. (C) 1999 Elsevier Science Ltd. All rights reserved.
Reductive Amination of Piperidines with Aldehydes Using Borane-Pyridine
作者:Alan E. Moormann
DOI:10.1080/00397919308009840
日期:1993.3
Abstract Borane-pyridine complex (BAP) was found to be an excellent replacement for NaCNBH3 in the Borch reduction. Assorted aromatic, heterocyclic and aliphatic aldehydes were reacted with various substituted piperidines using standardized conditions.
Benzoquinolizidine and benzoindolizidine derivatives and therapeutic uses thereof
申请人:American Biogenetic Sciences, Inc.
公开号:US06436954B1
公开(公告)日:2002-08-20
Benzo[b]quinolizidine and benzo[f]indolizidine derivatives are provided which are useful for the treatment of Alzheimer's disease, senile dementia or other conditions characterized by memory loss. Pharmaceutical compositions containing these compounds, and methods for their use, are also provided.