Hydrochloric Acid → 10-ethyl-8,9-dihydro-7-[(5-methyl-1H-imidazol-4-yl)methyl]pyrido[1,2-a]indol-6(7H)-one hydrochloride

HRID 1681753Notes

Reaction equation

[CH2:1]([C:3]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[N:5]2[C:12](=[O:23])[CH:13]([CH2:16][C:17]3[N:18]=[CH:19][NH:20][C:21]=3[CH3:22])[CH2:14][CH2:15][C:4]=12)[CH3:2].[ClH:24]>CO.CCOCC>[ClH:24].[CH2:1]([C:3]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[N:5]2[C:12](=[O:23])[CH:13]([CH2:16][C:17]3[N:18]=[CH:19][NH:20][C:21]=3[CH3:22])[CH2:14][CH2:15][C:4]=12)[CH3:2]

Participants

Conditions

Temperature: 60 °C

Procedure

A suspension of 10-ethyl-8,9-dihydro-7-[(5-methyl-1H-imidazol-4-yl)methyl]pyrido[1,2-a]indol-6(7H)one (285 mg) in methanol (20 ml) was treated with 12N hydrochloric acid (0.2 ml) and heated at 60° C. After concentration of the solution under reduced pressure to 3 ml, the solution was diluted with ether (6 ml) and allowed to stand at room temperature. The crystals were collected and washed with ether to give 10-ethyl-8,9-dihydro-7-[(5-methyl-1H-imidazol-4-yl)methyl]pyrido[1,2-a]indol-6(7H)one hydrochloride (273 mg).

Workup

customto stand at room temperature
customThe crystals were collected
washwashed with ether

Sources & evidence

ORD record: ord-d71b4fca42944bde8379accb87e9a605
Source dataset: uspto-grants-1992_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05173493

Reaction notes

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