Tetrahydrofuran → Ethyl {4-[4,9-bis(ethyloxy)-1-hydroxy-3-oxo-1,3-dihydro-2H-benzo[f]isoindol-2-yl]-3-fluorophenyl}acetate

HRID 889489Notes

Reaction equation

[CH2:1]([O:3][C:4]1[C:12]2[C:11](=[O:13])[N:10]([C:14]3[CH:19]=[CH:18][C:17]([CH2:20][C:21]([O:23][CH2:24][CH3:25])=[O:22])=[CH:16][C:15]=3[F:26])[C:9](=[O:27])[C:8]=2[C:7]([O:28][CH2:29][CH3:30])=[C:6]2[CH:31]=[CH:32][CH:33]=[CH:34][C:5]=12)[CH3:2].O1CCCC1.[BH4-].[Na+]>CO>[CH2:29]([O:28][C:7]1[C:8]2[C:9](=[O:27])[N:10]([C:14]3[CH:19]=[CH:18][C:17]([CH2:20][C:21]([O:23][CH2:24][CH3:25])=[O:22])=[CH:16][C:15]=3[F:26])[CH:11]([OH:13])[C:12]=2[C:4]([O:3][CH2:1][CH3:2])=[C:5]2[CH:34]=[CH:33][CH:32]=[CH:31][C:6]=12)[CH3:30]

Participants

Conditions

Temperature: 0 °C

Procedure

Ethyl {4-[4,9-bis(ethyloxy)-1,3-dioxo-1,3-dihydro-2H-benzo[f]isoindol-2-yl]-3-fluorophenyl}acetate (0.112 g, 0.24 mmol) was suspended in methanol (2 ml) and tetrahydrofuran (3 ml) added to dissolve the reactant. The reaction mixture was cooled to 0° C. in an ice bath and sodium borohydride (0.027 g, 0.72 mmol) added portionwise. Stirred under argon for 2-3 hours at 0° C. Further sodium borohydride was added to the reaction to push it to completion. The reaction mixture was evaporated to a solid and partitioned between EtOAc and ammonium chloride (saturated). The aqueous layer was extracted with EtOAc (×2) and the combined organics washed with brine and dried over MgSO4. Solvent was evaporated to give the title product as a gummy residue, which was triturated with hexane to afford a solid (0.111 g, 0.23 mmol).

Workup

dissolutionto dissolve the reactant
customThe reaction mixture was evaporated to a solid
custompartitioned between EtOAc and ammonium chloride (saturated)
extractionThe aqueous layer was extracted with EtOAc (×2)
washthe combined organics washed with brine
dry with materialdried over MgSO4
customSolvent was evaporated

Sources & evidence

ORD record: ord-7a5cd25991624a6a954f24534c0f3afa
Source dataset: uspto-grants-2012_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08252833B2

Reaction notes

Loading…