A series of novel alkanesulphonamidophenyl-N-alkyl-N-(heterocyclic-alkyl)alkylamine derivatives have been prepared, including their pharmaceutically acceptable salts, wherein the heterocyclic moiety is a 5- or 6-membered nitrogen-containing heterocyclic group which is attached to the adjacent carbon atom by a carbon or nitrogen atom and optionally contains a further heteroatom selected from oxygen and nitrogen, said nitrogen-containing heterocyclic group being either (i) substituted by a phenyl or benzyl group or (ii) fused at two adjacent carbon atoms to a benzene ring, with the resulting heterocyclic ring moiety also being optionally substituted. These particular compounds are useful in therapy as highly effective anti-arrhythmic agents and therefore, are of value in the treatment of various cardiac arrythmias. The most preferred member compound of the series is 2-hydroxy-2-(4-methanesulphonamidophenyl)-N-methyl-N-[2-(6-chloro-2H-isoin dolin-1-on-2-yl)ethyl]ethylamine. Methods for preparing all these compounds from known starting materials are provided.
Isoquinolinylsulfonamides as anti-arrhythmic agents
申请人:Pfizer Inc.
公开号:US05114952A1
公开(公告)日:1992-05-19
A series of novel alkanesulphonamidophenyl-N-alkyl-N-(heterocyclic-alkyl)alkylamine derivatives have been prepared, including their pharmaceutically acceptable salts. These compounds are useful in therapy as anti-arrhythmic agents and therefore, are of value in the treatment of various cardiac arrhythmias. Said sulfonamide compounds are of the formula: ##STR1## wherein R and R.sup.1 are each C.sub.1 -C.sub.4 alkyl; X is --CH.sub.2 --, --CO-- or --CH(OH)--; n is two, three or four; and "Het" is a nitrogen-containing heterocyclic group wherein said heterocyclic group is preferably 2H-3,4-dihydroisoquinol-1-on-2-yl or 2H-isoquinol-1-on-2-yl, each optionally substituted with halogen or C.sub.1 -C.sub.4 alkyl.
Antiarrhythmic agents of the formula:-
and their pharmaceutically acceptable salts,
wherein R is a C₁-C₄ alkyl group;
R¹ is a C₁-C₄ alkyl group;
X is -CH₂-, -CO- or -CH(OH)-;
n is 2, 3 or 4;
and "Het" is a 5- or 6-membered nitrogen-containing heterocyclic group which is attached to the adjacent carbon atom by a carbon or nitrogen atom and optionally contains a further heteroatom selected from 0 and N, said 5- or 6-membered nitrogen-containing heterocyclic group being either (i) substituted by a phenyl or benzyl group or (ii) fused at two adjacent carbon atoms to a benzene ring, said benzene ring being optionally substituted by 1 or 2 substituents each independently selected from halo and C₁-C₄ alkyl, and said 5- or 6-membered nitrogen-containing heterocyclic group being optionally substituted by up to 2 substituents each independently selected from oxo, halo and C₁-C₄ alkyl with the proviso that only one oxo substituent can be present.