Methylparaben → Methyl 4-(t-butyloxyacetyloxy)benzoate

HRID 583690노트

반응식

HRID 583690 반응식
Br[CH2:2][C:3]([O:5][C:6]([CH3:9])([CH3:8])[CH3:7])=O.[OH:10][C:11]1[CH:20]=[CH:19][C:14]([C:15]([O:17][CH3:18])=[O:16])=[CH:13][CH:12]=1.C([O-])([O-])=[O:22].[Cs+].[Cs+]>CN(C=O)C.C(OCC)(=O)C>[C:6]([O:5][CH2:3][C:2]([O:10][C:11]1[CH:12]=[CH:13][C:14]([C:15]([O:17][CH3:18])=[O:16])=[CH:19][CH:20]=1)=[O:22])([CH3:9])([CH3:8])[CH3:7]

참가 물질

6

반응물 3

HCID 7456MethylparabenHCID 10796Cesium carbonateHCID 79177tert-Butyl bromoacetate

생성물 1

HCID 18928531Methyl 4-(t-butyloxyacetyloxy)benzoate

시약·촉매·용매 2

HCID 6228Dimethylformamide용매HCID 8857Ethyl Acetate용매

실험 절차

t-Butyl bromoacetate (0.83 mL, 5.1 mmol), methyl 4-hydroxybenzoate (780 mg, 5.1 mmol) and Cs2CO3 (1.83 g, 5.6 mmol) were combined in 25 mL DMF. After 16 h, the reaction was diluted with ethyl acetate, washed with water, saturated NaHCO3, 10% KHSO4 and brine, dried (MgSO4) and concentrated providing 24-1 as a yellow oil. Rf 0.84 (silica, 50% EtOAC/hexane).

후처리

  1. washwashed with water, saturated NaHCO3, 10% KHSO4 and brine
  2. dry with materialdried (MgSO4)
  3. concentrationconcentrated

출처 및 근거

ORD 기록
ord-14cd9290c8114ddca16e3597b4b6c579
출처 데이터셋
uspto-grants-1999_07
특허 번호
US05929120

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