Sodium borohydride → 1-(2-Chloronaphthalen-1-yl)ethanol

HRID 912028노트

반응식

HRID 912028 반응식
[Cl:1][C:2]1[CH:11]=[CH:10][C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[C:3]=1[C:12](=[O:14])[CH3:13].[BH4-].[Na+]>CCO>[Cl:1][C:2]1[CH:11]=[CH:10][C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[C:3]=1[CH:12]([OH:14])[CH3:13]

참가 물질

4

반응물 2

HCID 4311764Sodium borohydrideHCID 674028271-(2-Chloro-1-naphthalenyl)ethanone

생성물 1

HCID 2307821-(2-Chloronaphthalen-1-yl)ethanol

시약·촉매·용매 1

HCID 702Ethanol용매

실험 절차

To an EtOH (70 ml) solution of 1-(2-Chloronaphthalen-1-yl)-ethanone (3.98 mmol; prepared according to J. Org. Chem. 1946, 11, 163-169) was added sodium borohydride (232 mg, 6.09 mmol). The mixture was stirred at rt under an atmosphere of nitrogen for one hour. After that time, the mixture was quenched with saturated NH4Cl followed by water, extracted with EtOAc (3×50 ml). The extracts were washed with water (50 ml), brine (50 ml), and dried over MgSO4. After concentration in vacuo, a beige oil was obtained. It was purified by chromatography on silica gel (25 g) eluting with an EtOAc/hexane gradient to give the title compound as a colorless oil. 1H NMR (400 MHz, CDCl3): δ=1.44 (d, J=6.4 Hz, 3H), 2.33 (d, J=3.6 Hz, 1H), 5.97-6.06 (m, 1H), 7.39 (d, J=8.8 Hz, 1H), 7.45-7.58 (m, 2H), 7.67 (d, J=8.8 Hz, 1H), 7.81 (dd, J=1.6, 8.0 Hz, 1H), 8.75 (d, J=8.0 Hz, 1H). MS (ES+): 189.19/191.20 [MH+−H2O]. HPLC: tR=3.38 min (polar—5 min, ZQ3).

후처리

  1. customAfter that time, the mixture was quenched with saturated NH4Cl
  2. extractionextracted with EtOAc (3×50 ml)
  3. washThe extracts were washed with water (50 ml), brine (50 ml)
  4. dry with materialdried over MgSO4
  5. concentrationAfter concentration in vacuo
  6. customa beige oil was obtained
  7. customIt was purified by chromatography on silica gel (25 g)
  8. washeluting with an EtOAc/hexane gradient

출처 및 근거

ORD 기록
ord-7927cdb8baa2479abe6d6b234548a440
출처 데이터셋
uspto-grants-2011_09
특허 번호
US08022206B2

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