3-Aminoquinoline → (R)-2-(2,2,2-Trifluoro-1,1-dimethyl-ethyl)-5,6,7,8-tetrahydro-quinoline-6-carboxylic acid quinolin-3-ylamide

Participants

Reaction Conditions

Reaction Steps

To a mixture of 3-quinolinamine (26 mg, 0.18 mmol), (R)-2-(1,1,1-trifluoro-2-methylpropan-2-yl)-5,6,7,8-tetrahydroquinoline-6-carboxylic acid (40 mg, 0.14) and N,N,N′,N′-tetramethyl-O-(7-azabenzotriazol-1-yl)uronium hexafluorophosphate (79 mg, 0.21 mmol) in N-methylpyrrolidinone (0.7 mL), followed by N,N-diisopropylethylamine (73 μL, 0.42 mmol) was added. Aliquot after 2 min: LCMS showed formation of the HOAt and Me ester, and some amide. After 1.3 h, the reaction was heated at 60° C. Aliquot after 25 h: LCMS showed the reaction was complete—all HOAt ester had been consumed. The material was filtered and purified by reverse-phase HPLC (20-80% ACN in 10 mM Et2NH/H2O; 3 injections of 400 μL, each) to afford the amide (43 mg, 75%) as a solid. 1H NMR (400 MHz, DMSO-d6) δ 10.56 (s, 1H), 8.95 (d, J=2.4 Hz, 1H), 8.76 (d, J=2.4 Hz, 1H), 7.96 (d, J=8.4 Hz, 1H), 7.92 (dd, J=1.1, 8.0 Hz, 1H), 7.68-7.54 (m, 3H), 7.40 (d, J=8.0 Hz, 1H), 3.08-3.00 (m, 2H), 2.99-2.87 (m, 3H), 2.29-2.20 (m, 1H), 2.03-1.91 (m, 1H), 1.56 (s, 6H); m/z=414.1 (M+1)+.

Provenance & Evidence