1.I.N. Ul’yanov Chuvash State University,Cheboksary,Russia;2.Perm State Pharmaceutical Academy,Perm,Russia;3.Perm Military Institute of Interior Ministry Troops,Perm,Russia
Abstract:
Methyl aroylpyruvates reacted with 4-amino-N-carbamimidoylbenzene-1-sulfonamide in acetic acid–ethanol (1: 1) to give methyl 4-aryl-2-{[4-(carbamimidoylsulfamoyl)phenyl]amino}-4-oxobut-2-enoates which were found to exist in solution as mixtures of Z and E isomers.