Hydrochloric Acid → (1S,3R)-3-(6H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-a]pyrazin-1-yl)cyclopentanamine hydrochloride

Participants

Reaction Conditions

Reaction Steps

To a mixture of tert-butyl (1S,3R)-3-(6H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-a]pyrazin-1-yl)cyclopentylcarbamate (1.57 g, 4.59 mmol) in 1,4-dioxane (45 mL) was added HCl (4 M in 1,4-dioxane, 8.0 mL, 32.0 mmol). The reaction mixture was then heated at about 60° C. After about 2 h, the reaction mixture was cooled to ambient temperature, filtered, while washing with Et2O (50 mL) and the solid was dried in a vacuum oven overnight at about 60° C. to give (1S,3R)-3-(6H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-a]pyrazin-1-yl)cyclopentanamine hydrochloride (1.38 g, 95%): LC/MS (Table 2, Method a) Rt=0.74 min; MS m/z: 243 (M+H)+.

Provenance & Evidence