Abstract:
There is provided novel cinnamide derivatives of Formula I: wherein R is C alkyl or trifluoromethyl; R is selected from the group consisting of pyridinyl, quinolinyl, thienyl, furanyl, 1,4-benzodioxanyl, 1,3-benzodioxolyl, chromanyl, indanyl, biphenylyl, phenyl and substituted phenyl in which said substituted phenyl is substituted with one or two substituents each independently selected-from the group consisting of halogen, C alkyl, C alkoxy, trifluoromethyl, trifluoromethoxy and nitro; R and R are each independently selected from the group consisting of hydrogen, C alkyl, and halogen; R is selected from the group consisting of di(C alkyl)amino, trifluoromethoxy and optionally substituted morpholin-4-yl, pyridinyl, pyrimidinyl, piperazinyl, and pyrazinyl with one or two substituents in which said substituent is independently selected from the group consisting of C alkyl, aminomethyl, hydroxymethyl, chloro or fluoro; R is hydrogen, chloro or fluoro; or R and R taken together are âCH CHâCH CHâ or âX(CH ) Yâ in which X and Y are each independently selected from the group consisting of CH , (CH ) N(R )â and O, wherein m is 1 or 2; n is 0 or 1; and R , R , and R are each independently selected from hydrogen, chloro and fluoro; and R is selected from the group consisting of hydrogen, C alkyl, hydroxyethyl, C alkoxyethyl, cyclopropylmethyl, âCO (C alkyl), and âCH CH NR R in which R and R are each independently hydrogen or C alkyl, which are openers of the KCNQ potassium channels and are useful in the treatment of disorders which are responsive to the opening of the KCNQ potassium channels.