Water → 2-(1-Fluoro-4-pentynyl)-4,5-dihydro-4,4-dimethyloxazole

HRID 236030

반응식

HRID 236030 반응식
[F:1][CH:2]([CH2:6][CH2:7][C:8]#[CH:9])[C:3]([OH:5])=O.[NH2:10][C:11]([CH3:15])([CH3:14])[CH2:12]O.O>C1(C)C(C)=CC=CC=1>[F:1][CH:2]([C:3]1[O:5][CH2:12][C:11]([CH3:15])([CH3:14])[N:10]=1)[CH2:6][CH2:7][C:8]#[CH:9]

참가 물질

5

반응물 3

HCID 962WaterHCID 118072-Amino-2-methyl-1-propanolHCID 130449502-Fluorohex-5-ynoic acid

생성물 1

HCID 130449512-(1-Fluoro-4-pentynyl)-4,5-dihydro-4,4-dimethyloxazole수율 57%

시약·촉매·용매 1

HCID 7237O-Xylene용매

실험 절차

A mixture of 2-fluoro-5-hexynoic acid (3.0 g, 23.05 mmol) and 2-amino-2-methyl-1-propanol (2.05 g, 23.05 mmol) in 150 ml of dry xylene was refluxed for 16 h. The water formed during the reaction was removed by Linde 3A molecular sieves (15 g) contained in a continuous extractor. The xylene was then distilled off at atmospheric pressure, and the resulting pot material was taken into ether (100 ml). The ethereal solution was washed with saturated sodium bicarbonate solution, water, and dried over MgSO4. Evaporation of ether at 35° C./~35 mm, and distillation of the resulting crude product gave 2.4 g (57%) of 2-(1-fluoro-4-pentynyl)-4,5-dihydro-4,4-dimethyloxazole as a colorless liquid, bp 62°-66° C./0.6 mmHg.

후처리

  1. temperaturewas refluxed for 16 h
  2. customwas removed by Linde 3A molecular sieves (15 g)
  3. distillationThe xylene was then distilled off at atmospheric pressure
  4. washThe ethereal solution was washed with saturated sodium bicarbonate solution, water
  5. dry with materialdried over MgSO4
  6. customEvaporation of ether at 35° C./
  7. distillation~35 mm, and distillation of the resulting crude product

출처 및 근거

ORD 기록
ord-3f005f8590e84160881ebbf91e673f74
출처 데이터셋
uspto-grants-1987_02
특허 번호
US04642364

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