Formaldehyde → 4-(5-Methoxy-1,3,4-thiadiazol-2-yl)-2-propyl-1,2,4-triazolidin-3-one

HRID 1579477

반응식

HRID 1579477 반응식
[CH2:1]([N:4]([C:6]([NH:8][C:9]1[S:10][C:11]([O:14][CH3:15])=[N:12][N:13]=1)=[O:7])[NH2:5])[CH2:2][CH3:3].[CH2:16]=O.[OH-].[K+]>CO>[CH2:1]([N:4]1[C:6](=[O:7])[N:8]([C:9]2[S:10][C:11]([O:14][CH3:15])=[N:12][N:13]=2)[CH2:16][NH:5]1)[CH2:2][CH3:3]

참가 물질

5

반응물 3

HCID 712FormaldehydeHCID 14797Potassium HydroxideHCID 21454627N-(5-Methoxy-1,3,4-thiadiazol-2-yl)-1-propylhydrazine-1-carboxamide

생성물 1

HCID 214546464-(5-Methoxy-1,3,4-thiadiazol-2-yl)-2-propyl-1,2,4-triazolidin-3-one

시약·촉매·용매 1

HCID 887Methanol용매

실험 절차

2-Propyl-4-(5-methoxy-1,3,4-thiadiazol-2-yl)-semicarbazide (0.1 mole) dissolved in methanol (100 ml) is charged into a glass reaction vessel equipped with a mechanical stirrer and thermometer. Aqueous formaldehyde (0.2 mole; 37% concentration) is then added to the reaction vessel with stirring. Dilute aqueous potassium hydroxide is added to the reaction mixture to adjust the pH to between 7 and 8 and stirring is continued for a period of about 20 minutes resulting in the formation of a solid precipitate. The precipitate is recovered by filtration, is recrystallized and is dried under vacuum to yield the desired product 2-propyl-4-(5-methoxy-1,3,4-thiadiazol-2-yl)-1,2,4-triazolidin-3-one.

후처리

  1. additionis charged into a glass reaction vessel
  2. customequipped with a mechanical stirrer
  3. stirringstirring
  4. customresulting in the formation of a solid precipitate
  5. filtrationThe precipitate is recovered by filtration
  6. customis recrystallized
  7. customis dried under vacuum

출처 및 근거

ORD 기록
ord-324730a25b0a4b6daa5412f34cc7bf63
출처 데이터셋
uspto-grants-1976_01
특허 번호
US03931209

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