Formic Acid → HCID 45380996, compound

Participants

Reaction Steps

A solution of (S)-tert-butyl 3-(4-amino-3-(4-aminophenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)pyrrolidine-1-carboxylate (0.080 g, 0.17 mmol) in CH2Cl2 (10 mL) was cooled in an ice-water bath. To this, 3-(trifluoromethyl)phenyl isocyanate (0.026 mL, 0.19 mmol) diluted in CH2Cl2 (5 mL) was added dropwise. The reaction was allowed to warm to room temperature and left stirring for 6 hours. After, formic acid (5 mL) and concentrated HCl (0.5 mL) were added dropwise directly to the reaction mixture. Three major species were observed by LC-MS corresponding to AD71a, AD71b, and AD71c. The reaction mixture was left stirring for 12 hours and then was concentrated in vacuo, resuspended in 50:50 H2O—CH3CN, and purified on a C18 column in CH3CN/H2O/0.1% TFA (1-100% gradient) to afford AD71a (ESI-MS m/z [M+H]+ found 483.5, calculated 483.2), AD71b (ESI-MS m/z [M+H]+ found 483.5, calculated 483.2), and AD71c (ESI-MS m/z [M+H]+ found 670.5, calculated 670.2).

Provenance & Evidence