Triethylamine → HCID 66746395, compound

Participants

Reaction Steps

A solution of 6-(tert-butoxycarbonylamino)hexanoic acid (0.21 g, 0.90 mmol) in dry DMF (10 mL) was treated with triethylamine (0.46 g, 4.51 mmol, 0.63 mL) and N,N,N′,N′-tetramethyl-O—(N-succinimidyl)uronium tetrafluoroborate (TSTU) (0.30 g, 0.99 mmol) at room temperature under a nitrogen atmosphere. The reaction mixture was stirred at room temperature over 3 h and then a solution of 5-(2-ammonio-2-methylpropoxy)-3-carboxy-2-methylquinolin-4-aminium chloride (Example 20b) (0.33 g, 0.90 mmol) and triethylamine (0.46 g, 4.51 mmol, 0.63 mL) in dry DMF was added dropwise at room temperature. The obtained mixture was stirred at room temperature over 3 days and the solvent was evaporated. The residue was dissolved in a mixture of MeOH and H2O (50 mL, 1:1) and the product was isolated by preparative HPLC (RPC18, H2O→CH3CN gradient). The appropriate fractions were collected and evaporated under reduced pressure. The residue was dried in a dessicator over phosphorus pentoxide to give 0.21 g (45%) of 4-amino-5-(2-(6-(tert-butoxycarbonylamino)hexanamido)-2-methylpropoxy)-2-methylquinoline-3-carboxylic acid as a white solid. 1H NMR (400 MHz, DMSO-d6) δ 12.95-12.65 (m, 1H), 12.45-11.95 (m, 1H), 9.05-8.60 (m, 1H), 7.84 (s, 1H), 7.67 (t, J=8.0 Hz, 1H), 7.29 (d, J=8.2 Hz, 1H), 7.02 (d, J=8.1 Hz, 1H), 6.71 (t, J=5.6 Hz, 1H), 4.36 (s, 2H), 2.78 (s, 3H), 2.70 (q, J=6.4 Hz, 2H), 2.05 (t, J=7.3 Hz, 2H), 1.45-1.34 (m, 2H), 1.36 (s, 3H), 1.34 (s, 3H), 1.30-1.19 (m, 2H), 1.14-1.03 (m, 2H). MS 503 (MH+).

Provenance & Evidence