Antiarrhythmics. N-(aminoalkylene)trifluoroethoxybenzamides and N-(aminoalkylene)trifluoroethoxynaphthamides.

Benzamides and naphthamides characterized by one or more 2,2,2-trifluoroethoxy ring substituents have been prepared and evaluated as antiarrhythmic agents in mice. Structure-action studies reveal that antiarrhythmic activity is highly dependent upon the number and position of 2,2,2-trifluoroethoxy groups. The most potent compounds are derived from 2,5-bis(2,2,2-trifluoroethoxy)benzamide, and, within this group, wide variation of the amide side chain is possible without adversely affecting the antiarrhythmic activity.