申请人:Giles Gordon Robert
公开号:US20070066662A1
公开(公告)日:2007-03-22
A process for preparing a compound of formula (I):
or a tautomeric form thereof or a pharmaceutically acceptable salt thereof, or a pharmaceutically acceptable solvate thereof, wherein:
A
1
represents a substituted or unsubstituted aromatic heterocyclyl group;
R
1
represents a hydrogen atom, an alkyl group, an acyl group, an aralkyl group, wherein the aryl moiety may be substituted or unsubstituted, or a substituted or unsubstituted aryl group;
A
2
represents a benzene ring having in total up to five substituents; and n represents an integer in the range of from 2 to 6, which process comprises catalytically reducing a compound of formula (II):
wherein A
1
, R
1
, A
2
and n are as defined in relation to formula (I), characterised in that the reduction reaction is carried out using a hydrogen pressure above 20 psi; and thereafter if required forming a pharmaceutically acceptable salt and/or a pharmaceutically acceptable solvate of the compound of formula (I).