1,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride → HCID 58149876, compound

Participants

Reaction Steps

1-Ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDCI; 0.77 g) and hydroxybenzotriazole (HOBt; 0.54 g) were added sequentially to a solution of 5-chloro-6-[(1-methylethyl)oxy]-3-pyridinecarboxylic acid (WO 2008128951; 0.43 g) in THF (20 mL) at room temperature and the resulting solution was stirred for 30 minutes. Ethyl 4-{5-[(hydroxyamino)(imino)methyl]-1-isoquinolinyl}butanoate (D43; 0.6 g) was added and the resulting suspension was stirred at room temperature for 1 hour. Tetra-n-butylammonium fluoride (TBAF; 1.57 g) was added to the reaction mixture and the resulting solution was heated to reflux for overnight. The solvent was evaporated in vacuo and the residue was dissolved in ethyl acetate (50 ml). The organic phase was washed with water and brine, then dried over anhydrous sodium sulphate. The dried solution was filtered and the filtrate was concentrated. The residue was purified by column chromatography to give the title compound (0.36 g). δH (CDCl3, 400 MHz): 1.29 (3H, t), 1.47 (6H, d), 2.25 (2H, m), 2.54 (2H, m), 3.50 (2H, m), 4.18 (2H, q), 5.52 (1H, m), 7.81 (1H, dd), 8.45 (1H, d), 8.53 (1H, d), 8.61 (2H, m), 8.79 (1H, d), 8.94 (1H, d). MS (ES): C25H25ClN4O4 requires 480. found 481.2 (M+H+).

Provenance & Evidence