N-(Aryloxyalkyl)-N'-(aminoalkyl)ureas and thioureas having the formula:
wherein R1 and R2 each represent a hydrogen atom or a loweralkyl, cycloalkyl, phenyl or phenyllower alkyl group, and R3 and R4 each represent a hydrogen atom or a loweralkyl, phenyl or phenylalkyl group or R3 and R4 taken together with the adjacent nitrogen form a heterocyclic residue are disclosed for use in treating cardiac arrhythmias.
An environmentally safe method of preparing a certain dialkylamine
申请人:MAKHTESHIM CHEMICAL WORKS LIMITED
公开号:EP0403952A2
公开(公告)日:1990-12-27
N-n-propyl-N-2-(2,4,6-trichlorophenoxy) ethyl amine is prepared by reacting 2-phenoxy ethanol with thionyl chloride in the presence of a catalytic amount of tetra-alkyl ammonium halide optionally in the presence of a solvent to form 2-phenoxy ethyl chloride; reacting the 2-phenoxy ethyl chloride with n-propylamine at a temp-erature of from 50°C to 150°C optionally in the presence of a solvent to form N-n-propyl-N-2-phenoxy-ethyl amine; selectively chlorinating N-n-propyl-N-2-phenoxyethyl amine with chlorine in the presence of a solvent; and recovering the N-n-propyl-N-2-(2,4,6-trichlorophenoxy) ethyl amine formed.