Patent number: 4810719
Abstract: There are described compounds of formula I, ##STR1## in which either R.sub.2 represents hydrogen, alkyl or Ar.sub.2, andR.sub.3 represents hydrogen, alkyl or alkyl substituted by Ar.sub.3 ;or R.sub.2 and R.sub.3 together form the chain --(CH.sub.2).sub.m --;R.sub.4 and R.sub.5, which may be the same or different, each independently represent hydrogen, halogen, Ar, alkyl, or alkyl substituted by Ar,Ar.sub.1, Ar.sub.2 and Ar, which may be the same or different each independently represent aryl or aryl substituted by one or more ofhalogen, hydroxy, --CN, --COR.sub.6, trihalomethyl, alkoxy, alkoxy substituted by --COR.sub.6, alkoxy substituted by --NR.sub.7 R.sub.8, alkyl, alkyl substituted by --COR.sub.6, alkyl substituted by NR.sub.7 R.sub.8, alkoxy substituted by Ar.sub.3, S(O).sub.n R.sub.9, --NR.sub.7 R.sub.8 or OAr.sub.3 ;R.sub.6 represents --OR.sub.10, --NR.sub.7 R.sub.8, hydrogen or alkyl;R.sub.7 and R.sub.8, which may be the same or different, each independently represent hydrogen, alkyl, alkanoyl or Ar.
Type:
Grant
Filed:
May 10, 1985
Date of Patent:
March 7, 1989
Assignee:
Fisons plc
Inventors:
Richard A. Appleton, Sidney C. Burford, David N. Hardern, David Wilkinson
Patent number: 4296114
Abstract: There are described compounds of formula I, ##STR1## in which R.sub.1 is phenyl substituted by halogen, alkoxy, alkyl, carboxy-alkyl, --NR.sub.4 R.sub.5, carboxy or alkoxy carbonyl,R.sub.3 is hydrogen, alkyl, mono- or di-carboxy alkyl, halo, alkoxy, phenyl, halo-phenyl, hydroxy, phenoxy, thiol, thioalkoxy, thiophenoxy, --NR.sub.4 R.sub.5, cyano, --COOH, carboxyureido, --CF.sub.3, --COR.sub.6, hydroxyalkyl, aminoalkyl, or alkoxy substituted by NR.sub.4 R.sub.5,ring A is a benzene or a pyridine ring which optionally carries up to 4 substituents R.sub.3, which may be the same or different,R.sub.4 and R.sub.5, which may be the same or different, each represent hydrogen, phenyl, halophenyl or alkyl, the alkyl optionally being substituted by alkoxy or by a mono- or di-alkyl or unsubstituted amino group; or R.sub.4 and R.sub.5, together with the nitrogen atom to which they are attached, form a piperidine, morpholine or an optionally alkyl substituted piperazine ring, andR.sub.
Type:
Grant
Filed:
August 2, 1979
Date of Patent:
October 20, 1981
Assignee:
Fisons Limited
Inventors:
Richard A. Appleton, David Johnston