Benzyl Bromide → 1-Benzyl-6-methyl-isatoic anhydride

HRID 1769601Notes

Reaction equation

[CH3:1][C:2]1[CH:3]=[CH:4][CH:5]=[C:6]2[NH:12][C:11](=[O:13])[O:10][C:8](=[O:9])[C:7]=12.[H-].[Na+].[H][H].[CH2:18](Br)[C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1>CN(C=O)C>[CH2:18]([C:7]12[C:2]([CH3:1])=[CH:3][CH:4]=[CH:5][CH:6]1[NH:12][C:11](=[O:13])[O:10][C:8]2=[O:9])[C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1

Participants

Conditions

Temperature: 45 °C

Procedure

A solution of 6-methyl-isatoic anhydride (4.5 gm) in DMF (30 ml) was added dropwise to a stirred suspension of 60% sodium hydride (1.0 gm) in DMF (20 ml) under nitrogen atmosphere. The reaction was then warmed to 45° C. and stirred until hydrogen evolution ceased. It was then cooled and a solution of benzyl bromide (4.4 gm) in DMF (10 ml) was added slowly. Stirring was continued for one hour at room temperature and the solution was then evaporated under reduced pressure at 45° C. The resulting solid was suspended in methylene chloride, the insoluble inorganic solid was removed by filtration and the filtrate was evaporated to give 1-benzyl-6-methyl-isatoic anhydride as a crystalline solid.

Workup

temperatureIt was then cooled
customthe solution was then evaporated under reduced pressure at 45° C
customthe insoluble inorganic solid was removed by filtration
customthe filtrate was evaporated

Sources & evidence

ORD record: ord-3009fbca2f8b4fe689e8df9d4b4751de
Source dataset: uspto-grants-1995_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05382572

Reaction notes

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