Sodium borohydride → (2R)-4-(5-Hydroxymethyl-3-trifluoromethyl-pyridin-2-yl)-2-methyl-piperazine-1-carboxylic acid tert-butyl ester

HRID 912966노트

반응식

HRID 912966 반응식
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[C:19]([C:20]([F:23])([F:22])[F:21])=[CH:18][C:17]([CH:24]=[O:25])=[CH:16][N:15]=2)[CH2:10][C@H:9]1[CH3:26])=[O:7])([CH3:4])([CH3:3])[CH3:2].[BH4-].[Na+]>CO>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[C:19]([C:20]([F:23])([F:21])[F:22])=[CH:18][C:17]([CH2:24][OH:25])=[CH:16][N:15]=2)[CH2:10][C@H:9]1[CH3:26])=[O:7])([CH3:4])([CH3:2])[CH3:3]

참가 물질

4

반응물 2

HCID 4311764Sodium borohydrideHCID 11501642(2R)-4-(5-Formyl-3-trifluoromethyl-pyridin-2-yl)-2-methyl-piperazine-1-carboxylic acid tert-butyl ester

생성물 1

HCID 11703510(2R)-4-(5-Hydroxymethyl-3-trifluoromethyl-pyridin-2-yl)-2-methyl-piperazine-1-carboxylic acid tert-butyl ester

시약·촉매·용매 1

HCID 887Methanol용매

반응 조건

온도
0 °C

실험 절차

To a solution of (2R)-4-(5-formyl-3-trifluoromethyl-pyridin-2-yl)-2-methyl-piperazine-1-carboxylic acid tert-butyl ester from step (e) above (4.48 g, 12 mmol) in methanol (30 mL) was added portionwise NaBH4 (542 mg, 14.4 mmol, Aldrich) with stirring at 0° C. The mixture was stirred at 0° C. for 30 min and the solvent was removed in vacuo. The residure was dissolved in EtOAc (60 mL) and washed with water (20 mL) and brine (20 mL), dried over Na2SO4, and filtered. The solvent was removed in vacuo and the residue was purified by silica gel column chromatography, eluting with 50% EtOAc/hexane to give the title compound as a gum. MS (ESI, pos. ion) m/e: 376 (M+1).

후처리

  1. stirringThe mixture was stirred at 0° C. for 30 min
  2. customthe solvent was removed in vacuo
  3. dissolutionThe residure was dissolved in EtOAc (60 mL)
  4. washwashed with water (20 mL) and brine (20 mL)
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. customThe solvent was removed in vacuo
  8. customthe residue was purified by silica gel column chromatography
  9. washeluting with 50% EtOAc/hexane

출처 및 근거

ORD 기록
ord-cbb09f95e9a2406e985e085ef771bb55
출처 데이터셋
uspto-grants-2011_09
특허 번호
US08026241B2

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