Water → 5-(3,5-dichloro-phenylsulphanyl)-1-ethyl-3-methyl-1H-pyrazol-4-yl-methanol

HRID 47631

반응식

HRID 47631 반응식
[Cl:1][C:2]1[CH:3]=[C:4]([S:9][C:10]2[N:14]([CH2:15][CH3:16])[N:13]=[C:12]([CH3:17])[C:11]=2[CH:18]=[O:19])[CH:5]=[C:6]([Cl:8])[CH:7]=1.[BH4-].[Na+].O>CO>[Cl:1][C:2]1[CH:3]=[C:4]([S:9][C:10]2[N:14]([CH2:15][CH3:16])[N:13]=[C:12]([CH3:17])[C:11]=2[CH2:18][OH:19])[CH:5]=[C:6]([Cl:8])[CH:7]=1

참가 물질

5

반응물 3

HCID 962WaterHCID 4311764Sodium borohydrideHCID 227474955-(3,5-dichloro-phenylsulphanyl)-1-ethyl-3-methyl-1H-pyrazole-4-carbaldehyde

생성물 1

HCID 227475205-(3,5-dichloro-phenylsulphanyl)-1-ethyl-3-methyl-1H-pyrazol-4-yl-methanol수율 81.5%

시약·촉매·용매 1

HCID 887Methanol용매

실험 절차

A mixture of 1.1 g of 5-(3,5-dichloro-phenylsulphanyl)-1-ethyl-3-methyl-1H-pyrazole-4-carbaldehyde and 0.53 g of sodium borohydride in 25 ml of anhydrous methanol was stirred under nitrogen at room temperature for 15 minutes. Water (25 ml) was added and the mixture was extracted three times with 20 ml of diethyl ether. The combined extracts were dried over magnesium sulphate, filtered and evaporated. The residue was purified by flash chromatography on silica gel using ethyl acetate/petroleum ether (bp 40-60° C.) (1:3) for the elution to give 902 mg of [5-(3,5-dichloro-phenylsulphanyl)-1-ethyl-3-methyl-1H-pyrazol-4-yl]-methanol as a yellow oil. Mass spectrum (ES) m/z 317 [M+H]+.

후처리

  1. extractionthe mixture was extracted three times with 20 ml of diethyl ether
  2. dry with materialThe combined extracts were dried over magnesium sulphate
  3. filtrationfiltered
  4. customevaporated
  5. customThe residue was purified by flash chromatography on silica gel
  6. washfor the elution

출처 및 근거

ORD 기록
ord-e741a956356942d5bfb341537bb78c20
출처 데이터셋
uspto-grants-2004_03
특허 번호
US06699887B2

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