Hydrochloric Acid → Hydrochloric Acid

Participants

Reaction Steps

[4-(3-{2-[(E)-3,5-Diamino-6-chloro-pyrazine-2-carbonylimino]-1,3,8-triaza-spiro[4.5]dec-8-yl}-3-oxo-propyl)-phenoxy]-acetic acid tert-butyl ester (WO09074575, Ex. 71, page 134) (28.4 g, 48.4 mmol) was slurried in 1,4-dioxane (260 ml) and stirred for 1 h. 4N HCl in dioxane (121 ml, 484 mmol) was added dropwise over 15 min and the reaction mixture was stirred overnight. The resulting yellow solid was filtered and washed with diethyl ether. The solid was slurried in fresh diethyl ether (500 ml) and sonicated for 30 min. The resulting solid was collected by filtration and dried in vacuo to afford the title product as a mono hydrochloride, di-dioxan solvate; LC-MS Rt 0.79 rains; 531.3 and 533.3 [M+H]+, Method 2minLC_v003.

Provenance & Evidence