Diisopropylethylamine → HCID 44227500, compound

Participants

Reaction Steps

5-(1H-Pyrazol-4-yl)-thiophene-3-carboxylic acid (0.080 g, 0.41 mmol) was suspended in acetonitrile (2 mL) then DIPEA (0.158 mL, 0.90 mmol) and 1-(2,2,2-trifluoro-ethyl)-decahydro-quinoxaline (0.119 g, 0.54 mmol) were added followed by HATU (0.192 g, 0.50 mmol). The resulting mixture was stirred for about 24 hours and then further amounts of DIPEA (79 μL) and HATU (0.192 g) were added and stirring continued over the weekend. The mixture was evaporated and the residue was taken up in sodium hydroxide (1 N) and stirred for 30 minutes. HCl (1 N, 2.5 mL) was added and the solution extracted with ethyl acetate (×3). The organics were dried over sodium sulfate, filtered and evaporated. The material was purified by HPLC, eluting with 5%-95% acetonitrile in water (0.1% formic acid) and the fractions containing the desired product were combined and freeze-dried to give the title compound as a white solid (0.020 g). LCMS m/z 399.17 [M+H]+ R.T.=10.05 min (Analytical Method 2).

Provenance & Evidence