Triethylamine → HCID 178440846, compound

Participants

Reaction Conditions

Reaction Steps

To a vial charged with 7-oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-carboxylic acid (50 mg, 0.28 mmol) and HATU (117 mg, 0.31 mmol) was added 2 mL of THF followed by triethylamine (85 mg, 0.84 mmol). The reaction mixture was allowed to stir for 10 minutes at room temperature, upon which 5-amino-2,4-di-tert-butylphenol (62 mg, 0.28 mmol) was added and the reaction was heated at 65° C. for 16 h. After 16 h, the reaction was cooled to room temperature and the solvent was removed in vacuo. The residue was purified by reverse phase HPLC (10%-99% CH3CN (0.035% TFA)/H2 0 (0.05% TFA)). LC/MS (10-99% CH3CN/0.05% TFA in H2O/0.05% TFA gradient over 3 min) to give N-(2,4-di-tert-butyl-5-hydroxyphenyl)-7-oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-carboxamide; M+H m/z 383.3, retention time 1.71 minutes. 1H NMR (400.0 MHz, DMSO) δ 13.48 (s, 1H), 10.68 (s, 1H), 9.24 (s, 1H), 8.78 (s, 1H), 8.06 (d, J=2.0 Hz, 1H), 7.17 (s, 1H), 7.13 (s, 1H), 6.41 (d, J=2.0 Hz, 1H), 1.36 (d, J=4.5 Hz, 18H).

Provenance & Evidence