Reaction equation
[F:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[NH:7][C:6](=[O:11])[C:5]2=[O:12].[H-].[Na+].[CH3:15][O:16][C:17]1[CH:24]=[CH:23][C:20]([CH2:21]Cl)=[CH:19][CH:18]=1.O>CN(C=O)C.C(OCC)(=O)C.CCCCCC>[F:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[N:7]([CH2:21][C:20]1[CH:23]=[CH:24][C:17]([O:16][CH3:15])=[CH:18][CH:19]=1)[C:6](=[O:11])[C:5]2=[O:12]Participants
Procedure
5-Fluoro-1H-indole-2,3-dione (956 mg, 5.79 mmol, 1 eq) was added as a solution in dry DMF to a stirred slurry of sodium hydride (278 mg, 11.6 mmol, 2 eq) in dry DMF drop wise over 15 minutes under an inert atmosphere with adequate pressure release to accommodate H2 evolution. The resulting mixture was stirred for 1 hour and p-methoxybenzyl chloride was added via syringe to the reaction. The solution was then stirred ca 2 hours and worked up by addition of water followed by extraction into ethyl acetate. The organic layer was washed twice with water and then dried over MgSO4. Column chromatography with ethyl acetate/hexane afforded 5-Fluoro-1-(4-methoxy-benzyl)-1H-indole-2,3-dione as a red solid (1.3 g, 80% yield). 1H NMR (CDCl3) δ (ppm): 7.3-7.24 (m, 3H), 7.20 (td, J=8.7, 2.7 Hz, 1H), 6.9-6.86 (m, 2H), 6.76 (dd, J=8.6, 3.6 Hz, 1H), 3.81 (s, 2H), 3.78 (s, 3H). LC/MS=286.1 (M+1).
Workup
- stirringThe solution was then stirred ca 2 hours
- extractionfollowed by extraction into ethyl acetate
- washThe organic layer was washed twice with water
- dry with materialdried over MgSO4
Sources & evidence
- ORD record
- ord-dbc008b6d4344431a0479a5e6a29980f
- Source dataset
- uspto-grants-2010_06
- Patent number
- US07732449B2
Linked notes
Loading…