Diisopropylethylamine → HCID 69928415, compound

Participants

Reaction Steps

1-Methyl-1H-pyrazol-3-amine (158 mg, 1.63 mmol) and DIEA (1.08 mL, 6.52 mmol) was added to a solution of (1-tert-Butoxycarbonylamino-3,3-difluoro-cyclobutyl)-hydroxy-acetic acid (1.63 mmol) dissolved in DMF (20 mL). The solution was cooled to 0° C. and after 10 minutes HATU (620 mg, 1.63 mmol) was added. After approximately 2 hours at RT, LC-MS showed product and no starting material and the solvent was removed by rotary evaporation. The crude product was dissolved in 40 mL EtOAc and washed with 25 mL sat. NaHCO3 (aq). The organic phase was dried with Na2SO4, filtered and evaporated to dryness. The crude product was purified on a 25 g silica column on a Biotage Flashmaster, which gave the title product as a white solid (92%). TLC rf: 0.07 in heptane:ethyl acetate 1:1.

Provenance & Evidence