Potassium Hydroxide → 2-{3-[7-(4-Fluoro-phenyl)-4-oxo-4,5-dihydro-3H-benzo[b][1,4]diazepin-2-yl]-phenyl}-thiazole-4-carboxylic acid

HRID 1745787Notes

Reaction equation

HRID 1745787 reaction equation
C([O:3][C:4]([C:6]1[N:7]=[C:8]([C:11]2[CH:16]=[CH:15][CH:14]=[C:13]([C:17]3[CH2:18][C:19](=[O:35])[NH:20][C:21]4[CH:27]=[C:26]([C:28]5[CH:33]=[CH:32][C:31]([F:34])=[CH:30][CH:29]=5)[CH:25]=[CH:24][C:22]=4[N:23]=3)[CH:12]=2)[S:9][CH:10]=1)=[O:5])C.[OH-].[K+]>CO.CS(C)=O>[F:34][C:31]1[CH:32]=[CH:33][C:28]([C:26]2[CH:25]=[CH:24][C:22]3[N:23]=[C:17]([C:13]4[CH:12]=[C:11]([C:8]5[S:9][CH:10]=[C:6]([C:4]([OH:5])=[O:3])[N:7]=5)[CH:16]=[CH:15][CH:14]=4)[CH2:18][C:19](=[O:35])[NH:20][C:21]=3[CH:27]=2)=[CH:29][CH:30]=1

Participants

5

Reactant 2

HCID 14797Potassium HydroxideHCID 695928182-{3-[7-(4-Fluoro-phenyl)-4-oxo-4,5-dihydro-3H-benzo[b][1,4]diazepin-2-yl]-phenyl}-thiazole-4-carboxylic acid ethyl ester

Product 1

HCID 222249612-{3-[7-(4-Fluoro-phenyl)-4-oxo-4,5-dihydro-3H-benzo[b][1,4]diazepin-2-yl]-phenyl}-thiazole-4-carboxylic acidYield 54.6%

Reagents, catalysts & solvents 2

HCID 679Dimethyl SulfoxideSolventHCID 887MethanolSolvent

Conditions

Temperature
23 °C

Procedure

To a solution of 2-{3-[7-(4-fluoro-phenyl)-4-oxo-4,5-dihydro-3H-benzo[b][1,4]diazepin-2-yl]-phenyl}-thiazole-4-carboxylic acid ethyl ester (Example 153) (49 mg, 0.1 mmol) in a mixture of MeOH (1 mL) and DMSO (1.5 mL) was added 2N KOH (1 mL, 2 mmol). The mixture was stirred at 23° C. for 0.5 h and then partitioned between ethyl acetate and H2O. The pH of the aqueous phase was set to 3 by the addition of 3N HCl and then stirred in the ice-bath for 0.5 h. The precipitate was collected by filtration, triturated with EtOH/Et2O (1/1) and dried, to give the title compound as light yellow solid (25 mg).

Workup

  1. custompartitioned between ethyl acetate and H2O
  2. additionThe pH of the aqueous phase was set to 3 by the addition of 3N HCl
  3. stirringstirred in the ice-bath for 0.5 h
  4. filtrationThe precipitate was collected by filtration
  5. customtriturated with EtOH/Et2O (1/1)
  6. customdried

Sources & evidence

ORD record
ord-e4b130893d4f43c8a4a21be06af0e8a7
Source dataset
uspto-grants-2006_03
Patent number
US07018998B2

Reaction notes

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