[EN] PIPERIDINE BASED UREAS AS NK1 ANTAGONISTS<br/>[FR] URÉES À BASE DE PIPÉRIDINE EN TANT QU'ANTAGONISTES DU NK1
申请人:GLAXO WELLCOME MFG PTE LTD
公开号:WO2010007032A1
公开(公告)日:2010-01-21
The invention provides a compound of formula (I) or a pharmaceutically acceptable salt thereof, wherein n is 1 or 2; useful in the treatment of conditions for which antagonism of NK1 receptor is beneficial.
A full study on the synthesis of 3-azabicyclo[4.1.0]heptane-1-carboxylic acid is described. Three different approaches were investigated in order to achieve an efficient synthesis of this unnatural aminoacid. The optimized synthetic route relies upon three key steps: (i) diazomalonate insertion on 4-phtalimido 1-butene, (ii) intramolecular cyclization and (iii) chemoselective reduction of the resulting