Potassium Carbonate → HCID 11234522, compound

Participants

Reaction Conditions

Reaction Steps

(S)-2-Amino-4,4-dimethyl-pentanoic acid [2-(5-fluoro-2,3-dihydro-indol-1-yl)-ethyl]-amide (20 mg, 0.066 mmol) was dissolved in DMF (0.7 mL) containing equimolar amounts of 2-chloropyrazine (6 μL, 0.066 mmol), 0.1 equivalents of CuI (1.3 mg, 0.006 mmol), and 1.5 equivalents of potassium carbonate (13.9 mg, 0.099 mmol). The mixture was stirred and heated by microwave to 240° C. for 30 minutes. After completion the mixture was purified by reverse phase LC to afford (S)-4,4-Dimethyl-2-(pyrazin-2-ylamino)-pentanoic acid [2-(5-fluoro-2,3-dihydro-indol-1-yl)-ethyl]-amide 2 (8.3 mg, 0.02 mmol, 32%): 1H-NMR (400 MHz, CD3OD) δ=8.37 (m, 2H), 6.82-6.41 (m, 4H), 4.57 (dd, J=9.2, J=3.2, 1H), 3.42 (t, J=6.2, 2H), 3.36 (t, J=8.2, 2H), 3.14 (m, 2H), 2.88 (t, J=8.2, 2H), 1.83-1.62 (m, 2H), 0.96 (s, 9H). MS calcd. for C21H29FN5O (M+H+) 386.23, found 386.5.

Provenance & Evidence