Ethyl Bromide → Diethyl 1-(ethyloxy)-4-hydroxy-2,3-naphthalenedicarboxylate

HRID 913171노트

반응식

HRID 913171 반응식
Br[CH2:2][CH3:3].[OH:4][C:5]1[C:14]2[C:9](=[CH:10][CH:11]=[CH:12][CH:13]=2)[C:8]([OH:15])=[C:7]([C:16]([O:18][CH2:19][CH3:20])=[O:17])[C:6]=1[C:21]([O:23][CH2:24][CH3:25])=[O:22].C(=O)([O-])[O-].[K+].[K+]>CC(C)=O>[CH2:2]([O:4][C:5]1[C:14]2[C:9](=[CH:10][CH:11]=[CH:12][CH:13]=2)[C:8]([OH:15])=[C:7]([C:16]([O:18][CH2:19][CH3:20])=[O:17])[C:6]=1[C:21]([O:23][CH2:24][CH3:25])=[O:22])[CH3:3]

참가 물질

5

반응물 3

HCID 6332Ethyl BromideHCID 11430Potassium CarbonateHCID 431092,3-Diethyl 1,4-dihydroxy-2,3-naphthalenedicarboxylate

생성물 1

HCID 58012479Diethyl 1-(ethyloxy)-4-hydroxy-2,3-naphthalenedicarboxylate수율 60.5%

시약·촉매·용매 1

HCID 180Acetone용매

실험 절차

Bromoethane (0.359 g, 3.29 mmol) was added to a stirred solution of diethyl 1,4-dihydroxy-2,3-naphthalenedicarboxylate (1 g, 3.29 mmol) and potassium carbonate (0.454 g, 3.29 mmol) in acetone (25 ml). The reaction mixture was refluxed for 24 hours under an atmosphere of argon. The resulting mixture was evaporated and the residue was partitioned between 2× ethylacetate and water. The combined organics were washed with water and dried over magnesium sulphate. The orange oil was purified by chromatography on silica gel, eluting with ethyl acetate (0-10%) in hexane to give the title compound as a clear oil (0.661 g, 1.99 mmol). LC/MS: Rt=3.63, [MH]− 331.

후처리

  1. temperatureThe reaction mixture was refluxed for 24 hours under an atmosphere of argon
  2. customThe resulting mixture was evaporated
  3. customthe residue was partitioned between 2× ethylacetate and water
  4. washThe combined organics were washed with water
  5. dry with materialdried over magnesium sulphate
  6. customThe orange oil was purified by chromatography on silica gel
  7. washeluting with ethyl acetate (0-10%) in hexane

출처 및 근거

ORD 기록
ord-0a674e5155784048ad31f92153c5cde8
출처 데이터셋
uspto-grants-2011_09
특허 번호
US08026270B2

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