Methanesulfonic Acid → 3-{8-(2,6-Difluorophenyl)-2-[(1h-imidazol-2-ylmethyl)amino]-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-4-yl}-4-methyl-n-1,3-thiazol-2-ylbenzamide methanesulfonate salt

Participants

Reaction Conditions

Reaction Steps

Using material as made above in Example 79c, a reaction vessel is charged with the amorphous free-base version of 3-{8-(2,6-difluorophenyl)-2-[(1H-imidazol-2-ylmethyl)amino]-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-4-yl}-4-methyl-N-1,3-thiazol-2-ylbenzamide (11.0 mg) and acetonitrile (250 μL) at room temperature (RT). The mixture is warmed to about 50° C. To the warmed mixture is added 1 eq of methanesulfonic acid solution (1N in water). The temperature is maintained for a few minutes until the solution clarifies. Heating is discontinued and the mixture is allowed to cool to room temperature while shaking. Shaking is continued at room temperature overnight. The product is filtered and washed with THF. Place cake in crystallization dish and dry for several hrs in vacuo (house vacuum, 50° C., N2 bleed). The yield is 70.8% (9.1 mg) of 3-{8-(2,6-difluorophenyl)-2-[(1H-imidazol-2-ylmethyl)amino]-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-4-yl}-4-methyl-N-1,3-thiazol-2-ylbenzamide methanesulfonate salt with a melting onset at 320° C. (determined by DSC).

Provenance & Evidence