Hydrochloric Acid → 4-methoxy-2-(1H-pyrazol-1-yl)butanoic acid

HRID 1888200노트

반응식

HRID 1888200 반응식
[CH3:1][O:2][CH2:3][CH2:4][CH:5]([N:10]1[CH:14]=[CH:13][CH:12]=[N:11]1)[C:6]([O:8]C)=[O:7].[OH-].[K+].Cl>CO.O>[CH3:1][O:2][CH2:3][CH2:4][CH:5]([N:10]1[CH:14]=[CH:13][CH:12]=[N:11]1)[C:6]([OH:8])=[O:7]

참가 물질

6

반응물 3

HCID 313Hydrochloric AcidHCID 14797Potassium HydroxideHCID 66839386Methyl 4-methoxy-2-(1H-pyrazol-1-yl)butanoate

생성물 1

HCID 579074424-methoxy-2-(1H-pyrazol-1-yl)butanoic acid수율 95%

시약·촉매·용매 2

HCID 887Methanol용매HCID 962Water용매

실험 절차

To a stirred solution of 0.045 g (0.23 mmol) of methyl 4-methoxy-2-(1H-pyrazol-1-yl)butanoate from step A in 2 mL of methanol was added a solution of 0.032 g (0.57 mmol) of potassium hydroxide in 0.5 mL of water. The mixture was stirred at ambient temperature for 1.5 h then acidified with a 2 N hydrochloric acid solution until a pH of 4 was achieved. The mixture was evaporated to remove all volatiles then extracted with ethyl acetate. The combined extracts were washed with brine, dried over magnesium sulfate, filtered and evaporated to dryness to afford the title compound (0.040 g, 95%). LC-MS: m/z (ES) 185 (MH)+.

후처리

  1. customThe mixture was evaporated
  2. customto remove all volatiles
  3. extractionthen extracted with ethyl acetate
  4. washThe combined extracts were washed with brine
  5. dry with materialdried over magnesium sulfate
  6. filtrationfiltered
  7. customevaporated to dryness

출처 및 근거

ORD 기록
ord-b9312fdc73ca4949a96ac24ffb0b8455
출처 데이터셋
uspto-grants-2013_08
특허 번호
US08501786B2

반응 노트

불러오는 중…