Trifluoroacetic acid → HCID 53251177, compound

Participants

Reaction Conditions

Reaction Steps

In a 10 mL sealed cap glass vial, tert-butyl (1S,2R)-2-(4-chloro-2-(2,4-dimethoxybenzyl)-7-fluoro-3-oxo-2,3-dihydro-1H-pyrrolo[3,4-c]pyridin-6-ylamino)cyclohexylcarbamate (50 mg, 0.091 mmol), 4-methyl-1H-imidazole (22.43 mg, 0.273 mmol) and K2CO3 (50.3 mg, 0.364 mmol) were dissolved in ACN (2 mL). The cap was sealed and the mixture was reacted at 100° C. for 16 h. The reaction mixture was subsequently filtered through a Buchner funnel to remove un-dissolved solids. The solids were washed with ACN (2×5 mL) and the filtrate was evaporated to give a residue, which was treated with TFA (4 mL) and heated at 80° C. for 1 h to remove the protecting groups. Next, TFA was evaporated from the reaction mixture. The resulting residue was reconstituted in DMSO (5 mL) and purified via preparative HPLC eluting with water (0.05% TFA) and ACN (15-65% gradient, 0.035% TFA). The pure fractions were combined, evaporated to a minimal volume, and lyophilized to give a TFA salt of the title compound as a white solid (7.2 mg, 23%). 1H NMR (400 MHz, DMSO-d6) δ ppm 1.20-1.65 (m., 8 H), 3.65-3.79 (m, 5 H), 4.15 (s, 2 H), 6.40 (d, 1 H), 6.51 (d, 1 H), 6.73 (m, 1 H), 6.97 (d, 1 H), 7.26 (d, 1 H), 8.68 (br s, 1 H). [M+H] calc'd for C17H21FN6O, 345; found, 345.

Provenance & Evidence