Lithium Hydroxide → cis(+/-)-2-(4-{[(4-Chloro-5-ethyl-1H-imidazol-2-yl)carbonyl]amino}-3-methoxypiperidin-1-yl)-1,3-benzothiazole-7-carboxylic acid

HRID 43434Notes

Reaction equation

[Cl:1][C:2]1[N:3]=[C:4]([C:9]([NH:11][C@H:12]2[CH2:17][CH2:16][N:15]([C:18]3[S:19][C:20]4[C:26]([C:27]([O:29]CC)=[O:28])=[CH:25][CH:24]=[CH:23][C:21]=4[N:22]=3)[CH2:14][C@H:13]2[O:32][CH3:33])=[O:10])[NH:5][C:6]=1[CH2:7][CH3:8].[OH-].[Li+]>CO.ClCCl>[Cl:1][C:2]1[N:3]=[C:4]([C:9]([NH:11][C@H:12]2[CH2:17][CH2:16][N:15]([C:18]3[S:19][C:20]4[C:26]([C:27]([OH:29])=[O:28])=[CH:25][CH:24]=[CH:23][C:21]=4[N:22]=3)[CH2:14][C@H:13]2[O:32][CH3:33])=[O:10])[NH:5][C:6]=1[CH2:7][CH3:8]

Participants

Conditions

Temperature: 70 °C

Procedure

Ethyl cis(±)-2-(4-{[(4-chloro-5-ethyl-1H-imidazol-2-yl)carbonyl]amino}-3-methoxypiperidin-1-yl)-1,3-benzothiazole-7-carboxylate obtained in Example (1h) (95 mg, 0.19 mmol) was dissolved in methanol (5 mL) and dichloromethane (2 mL). A 2 N aqueous lithium hydroxide solution (3 mL) was added, and the mixture was stirred at 70° C. for 1.5 hours. The organic solvent was evaporated under reduced pressure and 1 N hydrochloric acid was added until the pH of the solution was about 4. The resulting solid was collected by filtration and washed with distilled water to obtain 75 mg of the title compound as a white solid (84%).

Workup

customThe organic solvent was evaporated under reduced pressure and 1 N hydrochloric acid
additionwas added until the pH of the solution
filtrationThe resulting solid was collected by filtration
washwashed with distilled water

Sources & evidence

ORD record: ord-7c6331d412444c1b8774e6d285ab9947
Source dataset: uspto-grants-2013_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08536197B2

Reaction notes

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