Water → 6-[4-(2-Phenyl-2-hydroxyethyl)-1-piperazinylcarbonyl]-3,4-dihydrocarbostyril monohydrochloride

HRID 1460679Notes

Reaction equation

C(C[CH2:10][N:11]1[CH2:16][CH2:15][N:14]([C:17]([C:19]2[CH:20]=[C:21]3[C:26](=[CH:27][CH:28]=2)[NH:25][C:24](=[O:29])[CH2:23][CH2:22]3)=[O:18])[CH2:13][CH2:12]1)(=O)C1C=CC=CC=1.[ClH:30].NO.[OH2:33]>N1C=CC=CC=1>[ClH:30].[C:19]1([CH:17]([OH:33])[CH2:10][N:11]2[CH2:16][CH2:15][N:14]([C:17]([C:19]3[CH:20]=[C:21]4[C:26](=[CH:27][CH:28]=3)[NH:25][C:24](=[O:29])[CH2:23][CH2:22]4)=[O:18])[CH2:13][CH2:12]2)[CH:20]=[CH:21][CH:26]=[CH:27][CH:28]=1

Participants

Conditions

Temperature: 100 °C

Procedure

20 Grams of 6-[4-(2-benzoylethyl)-1-piperazinylcarbonyl]-3,4-dihydrocarbostyril and 5.33 g of hydroxylamine hydrochloride were dispersed in 40 ml of pyridine and the suspension was stirred at 100° C. for 4 hours. After the reaction was completed, the reaction mixture was poured into water and then extracted with chloroform, the extract was dried with anhydrous potassium carbonate, then the solvent was removed by evaporation. The thus obtained residue was purified by means of a silica gel column chromatography (eluent: dichloromethane:methanol =50:1), then recrystallized from ethanol to yield 8.79 g of 6[-4-(3-hydroxyimino-3-phenylpropyl)-1-piperazinylcarbonyl]-3,4-dihydrocarbostyril 1/2-hydrate. White powdery substance. Melting point: 167° C.-169° C. (decomp.)

Workup

extractionextracted with chloroform
dry with materialthe extract was dried with anhydrous potassium carbonate
customthe solvent was removed by evaporation
customThe thus obtained residue was purified by means of a silica gel column chromatography (eluent: dichloromethane:methanol =50:1)
customrecrystallized from ethanol

Sources & evidence

ORD record: ord-f8a2da02dffe447bb9fb0e3b3e411445
Source dataset: uspto-grants-1991_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05071856

Reaction notes

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