Diethyl Ether → 4-Vinylbenzoic acid

HRID 428782

반응식

HRID 428782 반응식
[CH:1]([C:3]1[CH:12]=[CH:11][C:6]([C:7]([O:9]C)=[O:8])=[CH:5][CH:4]=1)=[CH2:2].[OH-].[Na+].C(OCC)C>C1COCC1.O>[CH:1]([C:3]1[CH:12]=[CH:11][C:6]([C:7]([OH:9])=[O:8])=[CH:5][CH:4]=1)=[CH2:2]

참가 물질

6

반응물 3

HCID 3283Diethyl EtherHCID 14798Sodium HydroxideHCID 583124Methyl 4-ethenylbenzoate

생성물 1

HCID 140984-Vinylbenzoic acid수율 99.5%

시약·촉매·용매 2

HCID 962Water용매2회HCID 8028Tetrahydrofuran용매2회

실험 절차

To a well-stirred solution of methyl p-vinylbenzoate (36.0 g, 0.222 mole) in THF (200 mL) was added a solution of sodium hydroxide (17.78 g, 0.444 mole) in water (200 mL) at room temperature. After stirring overnight, water (100 mL), THF (150 mL), and ethyl ether (200 mL) was added and the phases separated. The aqueous phase was acidified with a solution of concentrated hydrochloric acid (41 mL) in water (90 mL) then extracted three times with THF (500-600 mL each). The latter combined organic extracts were dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo to provide 32.7 g (99.5 percent) of white solids. Proton nmr (Gemini model 300 MHz) in deuterochloroform: delta 8.08 (2H), 7.50 (2H), 6.78 (1H), 5.90 (1H), 5.41 (1H).

후처리

  1. customthe phases separated
  2. extractionthen extracted three times with THF (500-600 mL each)
  3. dry with materialThe latter combined organic extracts were dried over anhydrous magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo

출처 및 근거

ORD 기록
ord-0aeeedd0afab4e92ac9a1d754d9a4439
출처 데이터셋
uspto-grants-2001_11
특허 번호
US06313340B1

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