반응 #718247

반응 방정식

Compound 138

N-(4-(N-(5-Sulfamoyl-1,3,4-thiadiazol-2-yl)sulfamoyl)phenyl)acetamide

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product

수율 57.7%

5-(4-Aminophenylsulfonamido)-1,3,4-thiadiazole-2-sulfonamide

수율 57.7%

용매

HCl

반응 조건

후처리

1. 1
   기타The homogeneous solution was evaporated to dryness
2. 2
   여과the resulting solution was filtered
3. 3
   기타to remove insoluble matter
4. 4
   온도Cooling the solution overnight
5. 5
   기타gave a solid, which
6. 6
   여과was collected by filtration
7. 7
   세척washed with cold water
8. 8
   기타air-dried
9. 9
   기타Recrystallization from 20% ethanol/H2O

실험 절차

Compound 138 (1.0 g, 2.6 mmol) was heated at reflux with aqueous HCl (6 M, 10 mL) for 50 min. The homogeneous solution was evaporated to dryness and the residue was taken up in distilled water (10 mL). The pH was adjusted to 9 with 25% aqueous ammonia, the resulting solution was filtered to remove insoluble matter, and the solution acidified to pH 4 with glacial acetic acid. Cooling the solution overnight gave a solid, which was collected by filtration, washed with cold water, and air-dried. Recrystallization from 20% ethanol/H2O gave the pure product (500 mg, 1.5 mmol, 57%), mp 241-242° C. (lit17 mp 247-248° C.); 1H NMR (300 MHz, DMSO-d6) δ 6.58 (d, 2H, J=7.8 Hz), 7.43 (d, 2H, J=8.1 Hz), 8.43 (s, 2H); 13C NMR (75 MHz, DMSO-d6) δ 112.8, 125.9, 128.0, 153.1, 157.6, 166.0; LRMS (LCQ, ESI+) calcd for C8H10N5O4S3 336.0. found 335.8 (M+H)+. HRMS (ESI+, m/z) calcd for C8H10N5O4S3 335.9889. found 335.9883 (M+H)+.

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