Diisopropylethylamine → HCID 58487350, compound

Participants

Reaction Steps

To a solution of 5-(3,3,6-trimethyl-2,3-dihydrobenzo[3,4-b]furan-5-yl)pyrazine-2-ylamine (177) (19 mg, 0.075 mmol) in 1 ml DCM was added 2,6-difluorobenzoyl chloride (19 μl, 2 eq) followed by addition of DIEA (65 μl). The resulting solution was stirred at r.t. for 1 h. The reaction mixture was worked up with aq. NaHCO3/DCM. DCM phase was washed with brine, concentrated to dryness. The residue was dissolved in 1 ml THF/MeOH/H2O (5:4:1) and stirred with 1N NaOH (400 μl) at 60° C. for 1 h before worked up with EA/brine. Prep HPLC purification furnished (2,6-difluorophenyl)-N-[5-(3,3,6-trimethyl(2,3-dihydrobenzo[b]furan-5-yl))pyrazin-2-yl]carboxamide (178) (10.5 mg, yield: 35.4%, purity>95%) as off-white solid.

Provenance & Evidence