Benzoyl chloride → 4-(4-Chlorobenzoyl) 3,5-dichlorotoluene

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Reaction Steps

The compounds used in the present inventive method may be prepared using conventional synthetic techniques. Compound 1 can be prepared by the method described in U.S. Pat. No. 4,590,201. Briefly, 2,6-dichloro-4-methylbenzoic acid is converted to its corresponding benzoyl chloride using thionyl chloride in dimethylformamide. Reaction of this benzoyl chloride with chlorobenzene in the presence of aluminum trichloride provides 4-(4-chlorobenzoyl)-3,5-dichlorotoluene. Bromination of the methyl group is carried out using N-bromosuccinimide in the presence of catalytic amounts of dibenzoyl peroxide to provide 4-(4-chlorobenzoyl)-3,5-dichlorobenzyl bromide. The benzyl bromide is thenconverted to the corresponding benzyl azide using potassium azide. Treatment of the 4-(4-chlorobenzoyl)-3,5dichlorobenzyl azide thus formed with 2-cyanoacetamide in the presence of sodium methoxide provides after workup, 5-amino-1-(4-(4-chlorobenzoyl)-3,5-dichlorobenzyl)1,2,3-triazole-4-carboxamide (Compound 1).

Provenance & Evidence