Patent ID: 6906196

Claim:
A process for preparing a compound of the formula I wherein X is selected from the group consisting of trihalomethyl, C 1 -C 6 alkyl, and a group of the formula II wherein R 3 and R 4 are independently selected from the group consisting of hydrogen, halogen, hydroxyl, nitro, C 1 -C 6 alkyl, C 1 -C 6 alkoxy, carboxy, C 1 -C 6 trihaloalkyl, cyano, alkylsulfonyl, sulfamyl, phosphonato, and hydroxyalkyl; Y is p-sulfamylphenyl; and Z is selected from the group consisting of substituted and unsubstituted aryl; the process comprising: condensing an alkyne of formula III with an aryl hydrazins of the formula Y—NHNH 2 (IV) or a salt thereof.