Hydrochloric Acid → 1-(4-methylpiperidin-3-yl)-6H-imidazo[1,5-a]pyrrolo[2,3-e]pyrazine hydrochloride

HRID 1854414Notes

Reaction equation

[C:1]1([CH:13]2[CH:18]([CH3:19])[CH2:17][CH2:16][N:15](C(OC(C)(C)C)=O)[CH2:14]2)[N:5]2[C:6]3[CH:12]=[CH:11][NH:10][C:7]=3[N:8]=[CH:9][C:4]2=[CH:3][N:2]=1.[ClH:27]>O1CCOCC1.CCOCC>[ClH:27].[CH3:19][CH:18]1[CH2:17][CH2:16][NH:15][CH2:14][CH:13]1[C:1]1[N:5]2[C:6]3[CH:12]=[CH:11][NH:10][C:7]=3[N:8]=[CH:9][C:4]2=[CH:3][N:2]=1

Participants

Conditions

Temperature: 60 °C

Procedure

To a solution of tert-butyl 3-(6H-imidazo[1,5-a]pyrrolo[2,3-e]pyrazin-1-yl)-4-methylpiperidine-1-carboxylate (12.2 g, 34.3 mmol) in 1,4-dioxane (100 mL) was added 4N HCl (4N in 1,4-dioxane, 25.7 mL, 103 mmol). The reaction mixture was heated at about 60° C. for about 2 h. The mixture was allowed to cool to ambient temperature and was diluted with Et2O (100 mL). The mixture was triturated and filtered, and the precipitate was washed with Et2O (100 mL) to give 1-(4-methylpiperidin-3-yl)-6H-imidazo[1,5-a]pyrrolo[2,3-e]pyrazine hydrochloride (10 g, 98% yield) as a tan solid: LC/MS (Table 2, Method a) Rt=1.05 min; MS m/z: 256 (M+H)+.

Workup

temperatureto cool to ambient temperature
customThe mixture was triturated
filtrationfiltered
washthe precipitate was washed with Et2O (100 mL)

Sources & evidence

ORD record: ord-a0a746ae925e4a05b36731388bf46ee1
Source dataset: uspto-grants-2015_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08962629B2

Reaction notes

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