Application of Aryl Siloxane Cross-Coupling to the Synthesis of Allocolchicinoids
摘要:
In this communication, we report a new approach to the allocolchicine carbocyclic skeleton based upon an aryl siloxane coupling reaction and a phenanthrol ring expansion. These key steps allow for the selective functionalization of every carbon within the carbocyclic framework. The siloxane coupling-phenanthrol sequence was applied to the synthesis of two allocolchicinoids, including the first fully synthetic approach to N-acetyl colchinol-O-methyl ether (NCME).
[EN] COMPOSITIONS AND METHODS FOR REGULATING THE NERVOUS SYSTEM<br/>[FR] COMPOSITIONS ET METHODS POUR LA REGULATION DU SYSTEME NERVEUX
申请人:FILLION GILLES
公开号:WO2002030897A2
公开(公告)日:2002-04-18
La présente invention concerne des compositions et méthodes pour la régulation du système nerveux, notamment de désordres du système nerveux, périphérique ou central, à titre préventif ou curatif. L'invention décrit notamment des composés capables de modifier la transmission sérotonergique du cerveau et de a périphérie, et leurs utilisations thérapeutiques. L'invention concerne plus particulièrement des composés capables de lier le site allostérique de récepteurs sérotonergiques, ayant des propriétés pharmacologiques et thérapeutiques particulièrement avantageuses. L'invention concerne également des méthodes pour la préparation de ces composés, des compositions pharmaceutiques le contenant, et leurs utilisations thérapeutiques.
Excited state carbon acid dissociation and competing photorearrangements of 5<i>H</i>-dibenzo[a,c]cycloheptene derivatives
作者:David. Budac.、Peter Wan
DOI:10.1139/v96-162
日期:1996.8.1
dissociating excitedstate carbon acids were reported by our group. A necessary structural feature is the 5H-dibenzocycloheptene ring system where the incipient carbanion is formally an antiaromatic system in S0. In this work, structure–reactivity studies of the excited singlet state carbon acid dissociation and competing formal di-π-methane rearrangement of several 5H-dibenzo[a,c]cycloheptene derivatives
Application of Aryl Siloxane Cross-Coupling to the Synthesis of Allocolchicinoids
作者:W. Michael Seganish、Philip DeShong
DOI:10.1021/ol061413t
日期:2006.8.1
In this communication, we report a new approach to the allocolchicine carbocyclic skeleton based upon an aryl siloxane coupling reaction and a phenanthrol ring expansion. These key steps allow for the selective functionalization of every carbon within the carbocyclic framework. The siloxane coupling-phenanthrol sequence was applied to the synthesis of two allocolchicinoids, including the first fully synthetic approach to N-acetyl colchinol-O-methyl ether (NCME).