Potassium Hydroxide → Benzylmalonic acid

HRID 1757189

반응식

HRID 1757189 반응식
C(C1N(CC2C=CC=CC=2Cl)C([C:10]([CH2:21][C:22]2[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=2)([C:16]([O:18]CC)=[O:17])[C:11]([O:13]CC)=[O:12])=CN=1)CCC.[OH-].[K+]>C(O)C.O>[CH2:21]([CH:10]([C:11]([OH:13])=[O:12])[C:16]([OH:18])=[O:17])[C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1

참가 물질

5

반응물 2

HCID 14797Potassium HydroxideHCID 57500985Diethyl [2-n-butyl-1-{(2-chlorophenyl)methyl}-1h-imidazol-5-yl]-2-benzylmalonate

생성물 1

HCID 12031Benzylmalonic acid

시약·촉매·용매 2

HCID 702Ethanol용매HCID 962Water용매

실험 절차

A solution of diethyl [2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-5-yl]-2-benzyl -malonate [Example 8(iii)] (5.54 g, 0.0108 mol) in ethanol (75 mL) was treated all at once with a solution of potassium hydroxide (3.65 g, 0.065 mol) in water (50 mL). The resulting mixture was stirred at room temperature for 24 hours, then refluxed for 3 hours. The ethanol was evaporated, water was added to the aqueous product, and the basic solution was extracted with diethyl ether. The aqueous layer was acidified to pH 4 with hydrochloric acid and the product was extracted into ethyl acetate. The dried, concentrated product was crystallized twice-from ethyl acetate to give 0.6 g of 2-n-butyl-1-{(2chlorophenyl)methyl}-1H-imidazol-5-yl]-2-benzyl-malonic acid; mp 165°-166° C.(d). The filtrates from the crystallizations (4.9 g) consisted of additional malonic acid, the propanoic acid derivative and the mono ethyl ester malonate derivative. These are converted to [ 2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-5-yl]-2-benzylpropanoic acid by the method described previously.

후처리

  1. temperaturerefluxed for 3 hours
  2. customThe ethanol was evaporated
  3. additionwater was added to the aqueous product
  4. extractionthe basic solution was extracted with diethyl ether
  5. extractionthe product was extracted into ethyl acetate
  6. customThe dried, concentrated product was crystallized twice-from ethyl acetate

출처 및 근거

ORD 기록
ord-a9b9525e705143599e6070e8c0f12f10
출처 데이터셋
uspto-grants-1995_08
특허 번호
US05444080

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