Hydrogen Bromide → 6-{(E)-1-(4-tert-butylphenyl)-2-[(2R)-1-(2,4-dimethoxybenzyl)-5-oxopyrrolidin-2-yl]ethenyl}-3-ethylpyridin-2(1H)-one

HRID 70656Notes

Reaction equation

HRID 70656 reaction equation
Br.[C:2]([C:6]1[CH:11]=[CH:10][C:9](/[C:12](/[C:31]2[CH:36]=[CH:35][C:34]([CH2:37][CH3:38])=[C:33]([O:39]C)[N:32]=2)=[CH:13]\[C@@H:14]2[N:18]([CH2:19][C:20]3[CH:25]=[CH:24][C:23]([O:26][CH3:27])=[CH:22][C:21]=3[O:28][CH3:29])[C:17](=[O:30])[CH2:16][CH2:15]2)=[CH:8][CH:7]=1)([CH3:5])([CH3:4])[CH3:3].O>O1CCOCC1>[C:2]([C:6]1[CH:11]=[CH:10][C:9](/[C:12](/[C:31]2[NH:32][C:33](=[O:39])[C:34]([CH2:37][CH3:38])=[CH:35][CH:36]=2)=[CH:13]\[C@H:14]2[CH2:15][CH2:16][C:17](=[O:30])[N:18]2[CH2:19][C:20]2[CH:25]=[CH:24][C:23]([O:26][CH3:27])=[CH:22][C:21]=2[O:28][CH3:29])=[CH:8][CH:7]=1)([CH3:5])([CH3:4])[CH3:3]

Participants

5

Reactant 3

HCID 260Hydrogen BromideHCID 962WaterHCID 67397694HCID 67397694, compound

Product 1

HCID 674000826-{(E)-1-(4-tert-butylphenyl)-2-[(2R)-1-(2,4-dimethoxybenzyl)-5-oxopyrrolidin-2-yl]ethenyl}-3-ethylpyridin-2(1H)-oneYield 85.3%

Reagents, catalysts & solvents 1

HCID 312751,4-DioxaneSolvent

Conditions

Temperature
65 °C

Procedure

48% hydrobromic acid (0.6 mL) was added to a solution of (5R)-5-[(E)-2-(4-tert-butylphenyl)-2-(5-ethyl-6-methoxypyridin-2-yl)ethenyl]-1-(2,4-dimethoxybenzyl)pyrrolidin-2-one (59 mg) in 1,4-dioxane (0.6 mL), and the mixture was stirred at 65° C. for 1.5 hours. Water was added to the reaction solution, followed by extraction with ethyl acetate. The organic layer was washed with brine and dried over anhydrous magnesium sulfate, after which the solvent was evaporated under reduced pressure. The resulting residue was purified by silica gel column chromatography (chloroform:methanol=10:0→3:1) to give 6-{(E)-1-(4-tert-butylphenyl)-2-[(2R)-1-(2,4-dimethoxybenzyl)-5-oxopyrrolidin-2-yl]ethenyl}-3-ethylpyridin-2(1H)-one as a colorless oil (49 mg).

Workup

  1. extractionfollowed by extraction with ethyl acetate
  2. washThe organic layer was washed with brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. customafter which the solvent was evaporated under reduced pressure
  5. customThe resulting residue was purified by silica gel column chromatography (chloroform:methanol=10:0→3:1)

Sources & evidence

ORD record
ord-ea15ee9fc23e4776a1dca7ab2bfa2879
Source dataset
uspto-grants-2014_09
Patent number
US08822503B2

Reaction notes

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