Hydrochloric Acid → 5-Amino-1,3,4-thiadiazole-2-sulfonamide

HRID 345054

반응식

HRID 345054 반응식
C([NH:4][C:5]1[S:6][C:7]([S:10]([NH2:13])(=[O:12])=[O:11])=[N:8][N:9]=1)(=O)C.C(N)(=O)C.CC(NC1SC(S(N)(=O)=O)=NN=1)=O.Cl>CO>[NH2:4][C:5]1[S:6][C:7]([S:10]([NH2:13])(=[O:12])=[O:11])=[N:8][N:9]=1

참가 물질

5

반응물 3

HCID 313Hydrochloric Acid2회HCID 1986AcetazolamideHCID 67839732Acetamide 2-acetylamino-1,3,4-thiadiazole-5-sulfonamide

생성물 1

HCID 847245-Amino-1,3,4-thiadiazole-2-sulfonamide수율 85%

시약·촉매·용매 1

HCID 887Methanol용매

실험 절차

This is prepared by hydrolysis of the acetamide 2-acetylamino-1,3,4-thiadiazole-5-sulfonamide (acetazolamide). A slurry of 0.2 mol of acetazolamide in 600 mL of methanol is treated with 60 mL 12N HCl. This mixture is heated with stirring to reflux for 6 hours. Reaction progress is monitored using liquid chromatography. If reaction is not completed after 6 hours, another 30 mL of 12N HCl is added, and the mixture held at reflux for 2 hours. Methanol is then removed under reduced pressure. Product is recovered after raising the pH of the suspension to 7 by addition of NaOH at 0° C.-4° C., followed by filtration. Yield is between 85% and 98% of theoretical with 99% purity. KI =40 nM.

후처리

  1. temperatureThis mixture is heated
  2. temperatureto reflux for 6 hours
  3. customReaction progress
  4. customIf reaction
  5. temperatureat reflux for 2 hours
  6. customMethanol is then removed under reduced pressure
  7. customProduct is recovered
  8. temperatureafter raising the pH of the suspension to 7
  9. additionby addition of NaOH at 0° C.-4° C.
  10. filtrationfollowed by filtration

출처 및 근거

ORD 기록
ord-7d5ec70cfe78484ca6525dac5063a9e7
출처 데이터셋
uspto-grants-1991_10
특허 번호
US05055480

연결된 노트

불러오는 중…