Imino Diels–Alder reactions have been investigated as a new route to sparteine analogues. The first enantioselective synthesis of two diastereoisomeric tricyclic diamines, structurally equivalent to the ABC and BCD rings of the naturally occurring alkaloid, is reported, starting from enantiopure intermediates. The effectiveness of the diamines in the lithiation of N-Boc-pyrrolidine is discussed.
Bispidine-derived N-acyliminium ions in synthesis: stereocontrolled construction of the BCD rings of sparteine
作者:Justin R Harrison、Peter O'Brien
DOI:10.1016/s0040-4039(00)00999-0
日期:2000.8
Reaction of Grignard reagents with bispidine-derived N-acyliminium ions (generated in situ from an alpha-methoxy bispidine amide) has been studied as a new route to sparteine analogues. The addition reactions proceed with complete diastereoselectivity to generate products with the same relative stereochemistry as in the BCD rings of sparteine. The first stereocontrolled synthesis of a tricyclic diamine structurally equivalent to the BCD rings of sparteine, is described. (C) 2000 Published by Elsevier Science Ltd.
Synthesis by chiral diamine-mediated asymmetric alkylation
申请人:Janssen Pharmaceutica NV
公开号:EP1794129B1
公开(公告)日:2015-12-30
PROCESSES AND INTERMEDIATES
申请人:Vertex Pharmaceuticals Incorporated
公开号:US20130096277A1
公开(公告)日:2013-04-18
A process for preparing enantioselectively a compound of formula I-1a or I-1b:
over a compound of formulas I-2-I-7:
[EN] PROCESSES AND INTERMEDIATES<br/>[FR] PROCÉDÉS ET PRODUITS INTERMÉDIAIRES
申请人:VERTEX PHARMA
公开号:WO2011153423A2
公开(公告)日:2011-12-08
A process for preparing enantioselectively a compound of formula I-la or I-lb: over a compound of formulas 1-2 - 1-7