Ethanol → 8-Bromo-10-fluoro-2-hydroxy-9-trifluoromethyl-5,11-dihydro-6H-benzo[a]carbazole-3-carboxylic acid

HRID 1690670Notes

Reaction equation

C[O:2][C:3]([C:5]1[C:27]([OH:28])=[CH:26][C:8]2[C:9]3[NH:10][C:11]4[C:16]([C:17]=3[CH2:18][CH2:19][C:7]=2[CH:6]=1)=[CH:15][C:14]([Br:20])=[C:13]([C:21]([F:24])([F:23])[F:22])[C:12]=4[F:25])=[O:4].C(O)C.O.[Li+].[OH-]>C(OCC)(=O)C>[Br:20][C:14]1[CH:15]=[C:16]2[C:11](=[C:12]([F:25])[C:13]=1[C:21]([F:22])([F:23])[F:24])[NH:10][C:9]1[C:8]3[CH:26]=[C:27]([OH:28])[C:5]([C:3]([OH:4])=[O:2])=[CH:6][C:7]=3[CH2:19][CH2:18][C:17]2=1

Participants

Conditions

Temperature: 50 °C

Procedure

A sample of 8-Bromo-10-fluoro-2-hydroxy-9-trifluoromethyl-5,11-dihydro-6H-benzo[a]carbazole-3-carboxylic acid methyl ester (28.9 mg, 63.4 μmol) is treated with ethanol (0.3 mL) and water (0.5 mL) followed by LiOH (4 mg, 190 μmol). The reaction is then stirred at 50° C. overnight. The reaction is then diluted with ethyl acetate and extracted with 1 M HCl. The organics are then dried over MgSO4, filtered and the solvent is removed. The resulting residue is purified using a UV triggered HPLC to afford 22 mg of the title compound as a white solid; 1H NMR (400 MHz, MeOD) δ 7.78 (s, 1H), 7.76 (s, 1H), 7.32 (s, 1H), 3.00 (m, 2H), 2.95 (2, H); LC/MS calculated for [M+H]+ C18H11F4NO3: 445.1, found: 445.9.

Workup

extractionextracted with 1 M HCl
dry with materialThe organics are then dried over MgSO4
filtrationfiltered
customthe solvent is removed
customThe resulting residue is purified

Sources & evidence

ORD record: ord-66d475668ef84e18bde2471905e3014f
Source dataset: uspto-grants-2012_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08153671B2

Reaction notes

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