Sodium Bicarbonate → 6-amino-4-[2-[4-(thieno[3,2-c]pyridin-4-yl)-1-piperazinyl]ethyl]-2(1H)-quinolone hydrochloride

HRID 619121Notes

Reaction equation

Cl.[NH2:2][C:3]1[CH:4]=[C:5]2[C:10](=[CH:11][CH:12]=1)[NH:9][C:8](=[O:13])[CH:7]=[C:6]2[CH2:14][CH2:15][Cl:16].[N:17]1([C:23]2[C:28]3[CH:29]=[CH:30][S:31][C:27]=3[CH:26]=[CH:25][N:24]=2)[CH2:22][CH2:21][NH:20][CH2:19][CH2:18]1.C(=O)(O)[O-].[Na+]>CN(C)C=O.O>[ClH:16].[NH2:2][C:3]1[CH:4]=[C:5]2[C:10](=[CH:11][CH:12]=1)[NH:9][C:8](=[O:13])[CH:7]=[C:6]2[CH2:14][CH2:15][N:20]1[CH2:21][CH2:22][N:17]([C:23]2[C:28]3[CH:29]=[CH:30][S:31][C:27]=3[CH:26]=[CH:25][N:24]=2)[CH2:18][CH2:19]1

Participants

Conditions

Temperature: 60 °C

Procedure

A mixture of 0.35 g (1.35 mmol) of 6-amino-4-(2-chloroethyl)-2(1H)-quinolone hydrochloride, 0.33 g (1.5 mmol) of 4-(1-piperazinyl)thieno[3,2-c]pyridine and 0.17 g (2 mmol) of sodium bicarbonate in 10 ml of dimethylformamide is heated to 60° C. for 24 hours. After cooling to room temperature, the reaction medium is diluted in 50 ml of water and the crude product is extracted with chloroform. The organic phase is dried over sodium sulpbate and concentrated. The crude product is purified by flash chromatography on silica, eluting first with a methanol/ethyl acetate (6.5:93.5) mixture containing traces of triethylamine and then with a methanol/dichloromethane (6.5:93.5) mixture comprising traces of aqueous ammonia.

Workup

temperatureAfter cooling to room temperature
extractionthe crude product is extracted with chloroform
dry with materialThe organic phase is dried over sodium sulpbate
concentrationconcentrated
customThe crude product is purified by flash chromatography on silica
washeluting first with a methanol/ethyl acetate (6.5:93.5) mixture
additioncontaining traces of triethylamine

Sources & evidence

ORD record: ord-1ced206f81b74818b59db6b2120e60f8
Source dataset: uspto-grants-1999_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05958924

Reaction notes

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