1,2,4-Thiadiazol-5-amine--hydrogen chloride (1/1) → 4-(2-Oxo-4-(2,2,2-trifluoroacetyl)piperazin-1-yl)-n-(1,2,4-thiadiazol-5-yl)benzenesulfonamide

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Reaction Steps

Synthesized according to general procedure 12, method A. The reaction was set up with 1,2,4-Thiadiazol-5-ylamine hydrochloride (0.56 g, 4.0 mmol), anhydrous pyridine (3.5 mL), and 4-(2-oxo-4-(2,2,2-trifluoroacetyl)piperazin-1-yl)benzene-1-sulfonyl chloride (1.5 g, 4.0 mmol). The dark oil was purified via silica gel chromatography using 5% MeOH in CH2Cl2 followed by a second purification on silica gel using 80% EtOAc in hexanes to obtain the desired sulfonamide as a white solid (0.73 g, 1.92 mmol, 48% yield). LC/MS (10%-99% CH3CN (0.035% TFA)/H2O (0.05% TFA)), m/z: M+1 obs=436.1; tR=2.27 min.

Provenance & Evidence