Facile synthesis of azocino[4,3-b]indoles by ring-closing metathesis
摘要:
The azocino[4,3-b]indole system, tricyclic substructure of the indole alkaloids apparicine and ervaticine, is efficiently assembled by ring-closing metathesis of 2-allyl-3-(allylaminomethyl)indoles. The metathesis sites are introduced into the indole nucleus by reductive amination of a 3-formyl derivative with allylamine, followed by alpha-lithiation with subsequent electrophilic trapping with acrolein. (c) 2006 Elsevier Ltd. All rights reserved.
PROCESS FOR THE PREPARATION OF HETEROCYCLIC INDENE ANALOGS
申请人:F. HOFFMANN-LA ROCHE AG
公开号:EP1355880A2
公开(公告)日:2003-10-29
US6777559B2
申请人:——
公开号:US6777559B2
公开(公告)日:2004-08-17
US7169935B2
申请人:——
公开号:US7169935B2
公开(公告)日:2007-01-30
[EN] PROCESS FOR THE PREPARATION OF HETEROCYCLIC INDENE ANALOGS<br/>[FR] PROCEDE DE PREPARATION D'ANALOGUES D'INDENE HETEROCYCLIQUES
申请人:HOFFMANN LA ROCHE
公开号:WO2002059089A2
公开(公告)日:2002-08-01
The present invention is concerned with a novel process for the preparation of compounds of formula (I) wherein R1, R2 and X are as defined in the specification, comprising cyclocarbonylation of a compound of formula (II) wherein R?1, R2, R3¿ and X are as defined in the specification, to produce a compound of formula (III) wherein R?1, R2, R4¿ and X are as defined in the specification, followed by saponification.
Facile synthesis of azocino[4,3-b]indoles by ring-closing metathesis
作者:M.-Lluïsa Bennasar、Ester Zulaica、Daniel Solé、Sandra Alonso
DOI:10.1016/j.tet.2006.11.043
日期:2007.1
The azocino[4,3-b]indole system, tricyclic substructure of the indole alkaloids apparicine and ervaticine, is efficiently assembled by ring-closing metathesis of 2-allyl-3-(allylaminomethyl)indoles. The metathesis sites are introduced into the indole nucleus by reductive amination of a 3-formyl derivative with allylamine, followed by alpha-lithiation with subsequent electrophilic trapping with acrolein. (c) 2006 Elsevier Ltd. All rights reserved.