3-Aminoquinoline → HCID 66815771, compound

Participants

Reaction Steps

A solution of 2,3-dihydro-indole-1,5-dicarboxylic acid 1-tert-butyl ester (1.5 g, 5.70 mmol), O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate (HBTU) (2.37 g, 6.27 mmol), N,N-diisopropylethylamine (2.41 mL, 13.8 mmol) and 3-aminoquinoline (0.904 g, 6.27 mmol) in acetonitrile was heated to reflux for 20 hours. The solvent was evaporated in vacuo and the residue was partitioned between water and dichloromethane. The organic layer was separated, and the solvent was evaporated. The residue was purified by flash chromatography on silica gel eluted with ethyl acetate/hexane to give the product, 1.43 g (64%). MS: m/z 390 (MH+). 1H NMR (DMSO-d6): δ 1.54 (s, 9 H), 3.16 (t, 2 H), 4.00 (t, 2 H), 7.57-7.83 (m, 3 H), 7.88-8.00 (m, 4 H), 8.84 (d, 1 H), 9.15 (d, 1 H) and 10.53 (s, 1 H).

Provenance & Evidence