Cesium carbonate → Methyl 6-methoxycarbonylmethoxy-2-naphthoate

HRID 23233

반응식

HRID 23233 반응식
[CH3:1][O:2][C:3]([C:5]1[CH:14]=[CH:13][C:12]2[C:7](=[CH:8][CH:9]=[C:10]([OH:15])[CH:11]=2)[CH:6]=1)=[O:4].C([O-])([O-])=O.[Cs+].[Cs+].Br[CH2:23][C:24]([O:26][CH3:27])=[O:25]>CC(C)=O.CCOC(C)=O>[CH3:1][O:2][C:3]([C:5]1[CH:14]=[CH:13][C:12]2[C:7](=[CH:8][CH:9]=[C:10]([O:15][CH2:23][C:24]([O:26][CH3:27])=[O:25])[CH:11]=2)[CH:6]=1)=[O:4]

참가 물질

6

반응물 3

HCID 10796Cesium carbonateHCID 60984Methyl bromoacetateHCID 390995Methyl 6-hydroxy-2-naphthoate

생성물 1

HCID 18702924Methyl 6-methoxycarbonylmethoxy-2-naphthoate수율 85%

시약·촉매·용매 2

HCID 180Acetone용매HCID 8857Ethyl Acetate용매

실험 절차

To a stirred solution of 6-hydroxy-2-naphthoic acid methyl ester (0.500 g, 2.47 mmol) in acetone (25 mL) at rt was added Cs2CO3 (0.886 g, 2.72 mmol) followed by methyl bromoacetate (0.257 mL, 2.72 mmol) dropwise. After 18 h at this temperature, it was diluted with EtOAc (200 mL). This layer was washed with 1 N HCl (20 mL), sat. aq. NaHCO3 (20 mL), and brine (20 mL) and then dried (MgSO4). After concentration, the residue was recrystallized from MeOH:H2O to afford the product (0.573 g, 85%) as a solid; 1H NMR (DMSO-d6) δ3.71 (s, 3H), 3.87 (s, 3H), 4.95 (s, 2H), 7.30 (dd, J=2.6, 8.9 Hz, 1H), 7.38 (d, J=2.4 Hz, 1H), 7.87 (d, J=8.7 Hz, 1H), 7.92 (dd, J=1.6, 8.6 Hz, 1H), 8.06 (d, J=9.1 Hz, 1H), 8.55 (s, 1H); mass spectrum [(+) ESI], m/z 275 (M+H)+.

후처리

  1. washThis layer was washed with 1 N HCl (20 mL), sat. aq. NaHCO3 (20 mL), and brine (20 mL)
  2. dry with materialdried (MgSO4)
  3. concentrationAfter concentration
  4. customthe residue was recrystallized from MeOH

출처 및 근거

ORD 기록
ord-afc1d9bee9814a05b930b7c13a07bb3f
출처 데이터셋
uspto-grants-2005_02
특허 번호
US06849761B2

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