N-[alkylamino)alkyl]-3,4(or 4,5)-diaryl-1H-pyrazole-1-(branched)alkanamides and pyrazole-1-alkanamines useful for treating cardiac arrhythmias in mammals, are prepared by reacting a lower-alkyl ester of pyrazole-1-acetic acid with an appropriate diamine followed by reduction or by reacting the anion of a lower-alkyl ester of a pyrazole-1-acetic acid with an alkylating agent followed by displacement of the ester by an appropriate amine.
N-[烷基
氨基)烷基]-3,4(或4,5)-二芳基-1H-
吡唑-1-(支链)烷酰胺和用于治疗哺乳动物心律失常的
吡唑-1-烷胺,通过将
吡唑-1-乙酸的较低烷基酯与适当的二胺反应后进行还原制备,或者通过将
吡唑-1-乙酸较低烷基酯的阴离子与烷基化剂反应后再通过适当胺进行酯的置换制备。