Water → 4-bromo-7-(4-hydroxy-2,2-dimethylbutanamido)-9H-carbazole-1-carboxamide

HRID 661978

Reaction equation

Br.[NH2:2][C:3]1[CH:15]=[C:14]2[C:6]([C:7]3[C:8]([Br:19])=[CH:9][CH:10]=[C:11]([C:16]([NH2:18])=[O:17])[C:12]=3[NH:13]2)=[CH:5][CH:4]=1.[CH3:20][C:21]1([CH3:27])[CH2:25][CH2:24][O:23][C:22]1=[O:26].C[Al](C)C.O>C1COCC1>[Br:19][C:8]1[C:7]2[C:6]3[C:14](=[CH:15][C:3]([NH:2][C:22](=[O:26])[C:21]([CH3:27])([CH3:20])[CH2:25][CH2:24][OH:23])=[CH:4][CH:5]=3)[NH:13][C:12]=2[C:11]([C:16]([NH2:18])=[O:17])=[CH:10][CH:9]=1

Participants

Conditions

Temperature: 50 °C

Procedure

A mixture of 7-amino-4-bromo-9H-carbazole-1-carboxamide hydrobromide (Example 54-2, 500 mg, 1.299 mmol) and 3,3-dimethyldihydrofuran-2(3H)-one (222 mg, 1.948 mmol) in THF (10 mL) was treated with trimethylaluminum (2 M in toluene, 562 mg, 7.79 mmol) dropwise at rt. The mixture was heated at 50° C. for 1.5 h, cooled to rt and treated with water. The mixture was filtered through Celite and the solids were washed thoroughly with DCM and methanol. The filtrate was washed with water, dried and concentrated, and the residue was purified by column chromatography (eluting with a gradient from DCM to 10% ammonia-methanol-DCM) to provide 4-bromo-7-(4-hydroxy-2,2-dimethylbutanamido)-9H-carbazole-1-carboxamide as a yellow solid (250 mg, 46%). Mass spectrum m/z 418, 420 (M+H)+.

Workup

temperaturecooled to rt
filtrationThe mixture was filtered through Celite
washthe solids were washed thoroughly with DCM and methanol
washThe filtrate was washed with water
customdried
concentrationconcentrated
customthe residue was purified by column chromatography (
washeluting with a gradient from DCM to 10% ammonia-methanol-DCM)

Sources & evidence

ORD record: ord-5a000805a5ee4f41902c368f0ec51fda
Source dataset: uspto-grants-2011_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08084620B2

Linked notes

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