Acetic Acid → 7-fluoro-3,4-dihydro-2H-chromene-4-carboxylic acid

HRID 1021483노트

반응식

HRID 1021483 반응식
[F:1][C:2]1[CH:11]=[C:10]2[C:5](C(O[Si](C)(C)C)(C#N)[CH2:7][CH2:8][O:9]2)=[CH:4][CH:3]=1.[C:19]([OH:22])(=[O:21])[CH3:20]>Cl.O.C(OCC)(=O)C>[F:1][C:2]1[CH:11]=[C:10]2[C:5]([CH:20]([C:19]([OH:22])=[O:21])[CH2:7][CH2:8][O:9]2)=[CH:4][CH:3]=1

참가 물질

6

반응물 2

HCID 176Acetic AcidHCID 670801887-Fluoro-4-(trimethylsilyloxy)chroman-4-carbonitrile

생성물 1

HCID 670802337-fluoro-3,4-dihydro-2H-chromene-4-carboxylic acid수율 83.9%

시약·촉매·용매 3

HCID 313Hydrochloric Acid용매HCID 962Water용매HCID 8857Ethyl Acetate용매

반응 조건

온도
130 °C

실험 절차

7-Fluoro-4-(trimethylsilyloxy)chroman-4-carbonitrile (750 mg, 2.83 mmol) and SnCl2 dihydrate (2551 mg, 11.3 mmol) were diluted with glacial acetic acid (3 mL) and concentrated HCl (3 mL). The reaction was heated in an oil bath at 130° C. and stirred overnight. The reaction was allowed to cool, diluted with water and ethyl acetate. The layers were separated and the organic layer was dried over MgSO4, filtered and concentrated to yield the title compound (465 mg, 83.9% yield).

후처리

  1. temperatureto cool
  2. customThe layers were separated
  3. dry with materialthe organic layer was dried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated

출처 및 근거

ORD 기록
ord-0e6b5a19922f4455ac2984e4af089214
출처 데이터셋
uspto-grants-2014_05
특허 번호
US08716498B2

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