Benzaldehyde → 2-Styrylpyridine

HRID 1720201노트

반응식

HRID 1720201 반응식
[CH:1](=O)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[N:9]1[CH:14]=[CH:13][C:12](C)=[CH:11][CH:10]=1.[C:16](OC(=O)C)(=O)C>C(O)(=O)C.ClCCl>[CH:16]([C:14]1[CH:13]=[CH:12][CH:11]=[CH:10][N:9]=1)=[CH:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

참가 물질

6

반응물 3

HCID 240BenzaldehydeHCID 7918Acetic AnhydrideHCID 79634-Methylpyridine

생성물 1

HCID 1363502-Styrylpyridine

시약·촉매·용매 2

HCID 176Acetic Acid용매HCID 6344Dichloromethane용매

실험 절차

A stirring solution of benzaldehyde (44.6 g) and 4-picoline (37.2 g) in acetic acid (24 g) and acetic anhydride (40.8 g) was refluxed for 18 hours. The resultant reaction mixture were cooled, diluted with dichloromethane (300 ml), washed with water and dilute aqueous alkali; and quenched with dilute hydrochloric acid. Precipitate of styrylpyridine hydrochloride (long golden needles) was separated by filtration, washed with methylenechloride, dried and poured into stirred solution of sodium carbonate in water. After 2 hours of stirring white-gray precipitate was filtered, washed with water and dried overnight at 60°-70° C. After recrystallization, 39.6 g. of styrylpyridine were obtained.

후처리

  1. customThe resultant reaction mixture
  2. temperaturewere cooled
  3. washwashed with water and dilute aqueous alkali
  4. customand quenched with dilute hydrochloric acid
  5. customPrecipitate of styrylpyridine hydrochloride (long golden needles) was separated by filtration
  6. washwashed with methylenechloride
  7. customdried
  8. additionpoured
  9. filtrationAfter 2 hours of stirring white-gray precipitate was filtered
  10. washwashed with water
  11. customdried overnight at 60°-70° C
  12. customAfter recrystallization, 39.6 g

출처 및 근거

ORD 기록
ord-03169e2c5c7c4796a41118d0de8929a6
출처 데이터셋
uspto-grants-1996_04
특허 번호
US05506089

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