N-bromobutanimide → Ethyl 2-bromomethyl-4-(3,4-dimethoxyphenyl)-6,7-dimethoxyquinoline-3-carboxylate

HRID 1458929Notes

Reaction equation

HRID 1458929 reaction equation
[CH3:1][O:2][C:3]1[CH:4]=[C:5]2[C:10](=[CH:11][C:12]=1[O:13][CH3:14])[N:9]=[C:8]([CH3:15])[C:7]([C:16]([O:18][CH2:19][CH3:20])=[O:17])=[C:6]2[C:21]1[CH:26]=[CH:25][C:24]([O:27][CH3:28])=[C:23]([O:29][CH3:30])[CH:22]=1.[Br:31]N1C(=O)CCC1=O>C(Cl)(Cl)(Cl)Cl>[Br:31][CH2:15][C:8]1[C:7]([C:16]([O:18][CH2:19][CH3:20])=[O:17])=[C:6]([C:21]2[CH:26]=[CH:25][C:24]([O:27][CH3:28])=[C:23]([O:29][CH3:30])[CH:22]=2)[C:5]2[C:10](=[CH:11][C:12]([O:13][CH3:14])=[C:3]([O:2][CH3:1])[CH:4]=2)[N:9]=1

Participants

4

Reactant 2

HCID 67184N-bromobutanimideHCID 19032371Ethyl 4-(3,4-dimethoxyphenyl)-6,7-dimethoxy-2-methylquinoline-3-carboxylate

Product 1

HCID 21851143Ethyl 2-bromomethyl-4-(3,4-dimethoxyphenyl)-6,7-dimethoxyquinoline-3-carboxylateYield 58.2%

Reagents, catalysts & solvents 1

HCID 5943Carbon TetrachlorideSolvent

Procedure

A mixture of ethyl 6,7-dimethoxy-4-(3,4-dimethoxyphenyl)-2-methylquinoline-3-carboxylate (411 mg), N-bromosuccinimide (214 mg), 2,2-azobis(isobutyronitrile) (10mg) and carbon tetrachloride (10 ml) was stirred under reflux for 5 hours. The reaction mixture was washed with water, dried over magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was subjected to column chromatography on silica gel. The fractions eluted with chloroform/ethyl acetate (10/1, v/v) gave ethyl 2-bromomethyl-6,7-dimethoxy-4-(3,4-dimethoxyphenyl)quinoline-3-carboxylate (285 mg, 58%) which was then recrystallized from ethyl acetate-hexane. Colorless prisms. mp. 135°-136° C.

Workup

  1. temperatureunder reflux for 5 hours
  2. washThe reaction mixture was washed with water
  3. dry with materialdried over magnesium sulfate
  4. customThe solvent was evaporated under reduced pressure
  5. washThe fractions eluted with chloroform/ethyl acetate (10/1

Sources & evidence

ORD record
ord-8e039692e9a143c091543857bca9793a
Source dataset
uspto-grants-1998_12
Patent number
US05852039

Reaction notes

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