2-Chlorobenzoic Acid → 5-n-Butyl-4-[[2'-[N-(2-chlorobenzoyl)sulfamoyl]-5'-ethylbiphenyl-4-yl]methyl]-2-(2-chloro-5-nitrophenyl)-2,4-dihydro-3H-1,2,4-triazol-3-one

Beteiligte Stoffe

Reaktionsschritte

The reaction of 5-n-butyl-2-[2-chloro-5-nitrophenyl]-2,4-dihydro-4-[(2'-sulfamoyl-5'-ethylbiphenyl-4-yl)methyl]-3H-1,2,4-triazol-3-one (from Step B) with 2-chlorobenzoic acid (3 equivalents), CDI (3 equiv), and DBU (3 equiv) was carried out according to the procedure of Example 51 to give an 80% yield of the title compound as a yellow solid; minor impurity by TLC in 95:5 CH2Cl2 --MeOH but suitable for use without further purification; mass spectrum (FAB) m/e 708 (M+1)+.

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