Water → 4-Hydroxymethyl-3-methylbenzofuran-2-carboxylic acid ethyl ester

HRID 29328노트

반응식

HRID 29328 반응식
[CH2:1]([O:3][C:4]([CH:6]1[C:10]([CH3:11])=[C:9]2[C:12](=[C:16]=[O:17])[CH:13]=[CH:14][CH:15]=[C:8]2[O:7]1)=[O:5])[CH3:2].[BH4-].[Na+].O>C(O)C>[CH2:1]([O:3][C:4]([C:6]1[O:7][C:8]2[CH:15]=[CH:14][CH:13]=[C:12]([CH2:16][OH:17])[C:9]=2[C:10]=1[CH3:11])=[O:5])[CH3:2]

참가 물질

5

반응물 3

HCID 962WaterHCID 4311764Sodium borohydrideHCID 865990284-Carbonyl-3-methylbenzofuran-2-carboxylic acid ethyl ester

생성물 1

HCID 687118924-Hydroxymethyl-3-methylbenzofuran-2-carboxylic acid ethyl ester수율 91%

시약·촉매·용매 1

HCID 702Ethanol용매

실험 절차

To a solution of 0.123 g (0.530 mmol) of 4-carbonyl-3-methylbenzofuran-2-carboxylic acid ethyl ester in 10 mL of ethanol was added 0.019 g (0.505 mmol) of sodium borohydride. The reaction was stirred at room temperature for 2 h and than diluted wuth water and extracted with ethyl acetate. The combined organics were washed with water and brine, dried over magnesium sulfate, filtered and concentrated in vacuo. The residue was chromatographed on silica gel eluting with ethyl acetate/hexanes (1:3) to provide 0.113 g of 4-hydroxymethyl-3-methylbenzofuran-2-carboxylic acid ethyl ester.

후처리

  1. extractionextracted with ethyl acetate
  2. washThe combined organics were washed with water and brine
  3. dry with materialdried over magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customThe residue was chromatographed on silica gel eluting with ethyl acetate/hexanes (1:3)

출처 및 근거

ORD 기록
ord-6cd94ab7971b402682225449c31167ce
출처 데이터셋
uspto-grants-2008_09
특허 번호
US07420001B2

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