4-Cyanopyridine → HCID 178419986, 화합물

HRID 127702

반응식

HRID 127702 반응식
[Na].[N:2]1[CH:7]=[CH:6][C:5]([C:8]#[N:9])=[CH:4][CH:3]=1.[N:10]1[CH:15]=[CH:14][N:13]=[CH:12][C:11]=1[C:16]([NH:18][NH2:19])=O>CO>[N:10]1[CH:15]=[CH:14][N:13]=[CH:12][C:11]=1[C:16]1[N:9]=[C:8]([C:5]2[CH:6]=[CH:7][N:2]=[CH:3][CH:4]=2)[NH:19][N:18]=1

참가 물질

5

반응물 3

HCID 75064-CyanopyridineHCID 258796Pyrazine-2-Carboxylic Acid HydrazideHCID 5360545Sodium

생성물 1

HCID 178419986HCID 178419986, 화합물

시약·촉매·용매 1

HCID 887Methanol용매2회

반응 조건

온도
260 °C

실험 절차

Sodium (0.4 grams) is added to pyridine-4-carbonitrile (8.3 grams, 0.08 mole) in methanol, and the solution is allowed to stand 30 minutes at room temperature. A suspension of pyrazine carboxylic acid hydrazide (9.6 grams, 0.07 mole) in methanol (160 ml.) is added, and the resulting solution is heated at reflux for 30 minutes. After cooling, the intermediate acylamidrazone is collected by filtration. The acyclic intermediate is then heated at 260° C. for 15 minutes, after which the reaction is cooled to room temperature. Upon recrystallization from acetonitrile-water, 3-pyrazinyl-5-(4-pyridyl)-1,2,4-triazole is obtained, m.p. 251°-252.5° C.

후처리

  1. additionis added
  2. temperaturethe resulting solution is heated
  3. temperatureat reflux for 30 minutes
  4. temperatureAfter cooling
  5. filtrationthe intermediate acylamidrazone is collected by filtration
  6. temperatureafter which the reaction is cooled to room temperature
  7. customUpon recrystallization from acetonitrile-water

출처 및 근거

ORD 기록
ord-7c3c9875c0534acdaf565b093f156b5a
출처 데이터셋
uspto-grants-1981_03
특허 번호
US04256887

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