Patent number: 4499269
Abstract: There are described compounds of formula I, ##STR1## in which X is O, S or N--R.sub.7,each Y, which may be the same or different, is H, OH, alkyl C1-C8, alkoxy C1-C8 or halogen,n is an integer from 1 to 4 inclusive,R and R.sub.1, which may be the same or different, are each H; alkanoyl C2-C8 or a group R.sub.4 in which R.sub.4 is alkyl C1-C8 optionally substituted by phenyl; or is cycloalkyl C5 or C6; or is a group of formula XVI, ##STR2## in which W and Z, which may be the same or different, are each H, OH, alkoxy C1-C8, phenyl-alkoxy C7 to C10, alkyl C1-C8, halogen, --NR.sub.2 R.sub.3, --COOR.sub.2, NO.sub.2, alkanoyloxy C2-C8, or --OCH.sub.2 CH.sub.2 NR.sub.2 R.sub.3, andR.sub.2, R.sub.3 and R.sub.7, which may be the same or different, are each H or alkyl C1-C8,provided that when X is N--R.sub.7 and R is H, then R.sub.1 is not (a) H when any Y groups are H, alkyl C1-C8, alkoxy C1-C8 or halogen, or (b) unsubstituted phenyl when all Y groups are H,and pharmaceutically acceptable salts thereof.
Type:
Grant
Filed:
April 20, 1983
Date of Patent:
February 12, 1985
Assignee:
Fisons plc
Inventors:
Colin Bennion, David Robinson
Patent number: 4474788
Abstract: There are described compounds of formula I, ##STR1## in which R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.7, which may be the same or different, each represent hydrogen, hydroxy, alkyl Cl to 6, alkoxy C1 to 6, amino, acyl C2 to 6, acylamino C2 to 6, alkenyl C2 to 6, halogen, or alkoxy C1 to 6 substituted by phenyl,X is a hydrocarbon chain of 1 to 10 carbon atoms optionally substituted by a hydroxy group,A is --Q--COOH,Q is absent or represents a straight or branched alkylene, alkenylene or alkynylene group of up to and including 6 carbon atoms,R.sub.8 and R.sub.9, which may be the same or different, each represent hydrogen or alkyl C1 to 6 or together form a single bond,D, Y and Z, which may be th same or different, each represent sulphur, oxygen or --NR.sub.10 --, andR.sub.10 is hydrogen or alkyl C1-C6,provided that(i) when D, Z and Y are all oxygen, R.sub.8 and R.sub.9 do not together form a single bond,(ii) when D is oxygen, R.sub.8 and R.sub.9 together form a single bond, X is (CH.sub.2).sub.
Type:
Grant
Filed:
November 1, 1982
Date of Patent:
October 2, 1984
Assignee:
Fisons plc
Inventor:
John R. Bantick