Patent number: 6506758
Abstract: A compound of formula (I):
or a salt thereof, or a solvate thereof, wherein:
A represents an optionally substituted aryl group or an optionally substituted heterocyclyl group;
Ra represents —CO—NRsRt wherein Rs and Rt each independently represent hydrogen, alkyl, substituted alkyl, optionally substituted alkenyl, optionally substituted aryl, optionally substituted arylalkyl, optionally substituted heterocyclyl or an optionally substituted heterocyclylalkyl group, or Rs and Rt together with the nitrogen to which they are attached form a heterocyclyl group;
R1 and R2 each independently represents hydrogen, hydroxy, amino, alkoxy, optionally substituted aryloxy, optionally substituted benzyloxy, alkylamino, dialkylamino, halo, trifluoromethyl, trifluoromethoxy, nitro, alkyl, carboxy, carbalkoxy, carbamoyl, alkylcarbamoyl, or R1 and R2 together represent methylenedioxy, carbonyldioxy or carbonyldiamino; and
R3 represents hydrogen, alkanoyl, alkyl, aminoalkyl, hydroxyalkyl, carbox
Type:
Grant
Filed:
October 11, 2001
Date of Patent:
January 14, 2003
Assignees:
SmithKline Beecham Laboratoires Pharmceutiques, SmithKline Beecham SpA
Inventors:
Stefania Gagliardi, Guy Marguerite Marie Gerard Nadler, Pietro A T Novella