Triethylamine → HCID 85064038, compound

Participants

Reaction Steps

To a solution of 3-{3-[(furan-2-ylmethyl)-sulfamoyl]-phenyl}-acrylic acid (5z) (0.17 g, 0.55 mmol) in tetrahydrofuran (2.0 ml) at 0° C. temperature ethylchloroformate (0.072 g 0.66 mmol) and triethylamine (0.1 ml, 0.72 mmol) were added and the resulting mixture was stirred for 15 min. To a stirred solution of KOH (0.058 g, 1.04 mmol) in methanol (0.25 ml) a solution of hydroxylamine hydrochloride (0.072 g, 1.04 mmol) in methanol (0.7 ml) was added at 0° C. The mixture was stirred for 15 min., the precipitated KCl was removed and the filtrate was added to the first solution. The reaction mixture was stirred at room temperature for 2 hours. Then the mixture was partitioned between 1N KH2PO4 solution and ethyl acetate. The organic layer was washed with water, saturated NaCl, and dried (Na2SO4). The solvent was evaporated and the residue was washed successively with dichloromethane and ethyl acetate affording the title compound (0.057 g, 32%), M.p. 165° C., 1H NMR (DMSO-d6, HMDSO) δ: 4.03 (2H, d, J=6.4 Hz); 6.23 (2H, m); 6.54 (1H, d, J=16.0 Hz); 7.38-8.05 (6H, m); 8.20 (1H, t, J=6.4 Hz); 9.09 (1H, br s); 10.83 (1H, br s). HPLC analysis on Zorbax SB-C18 column: impurities 8% (column size 4.6×150 mm; mobile phase methanol—0.1% H3PO4, gradient from 30 to 90%; detector UV 270 nm; flow rate 1.5 ml/min; sample concentration 1.0 mg/ml). Anal. Calcd for C14H14N2O5S, %: C 52.17, H 4.38, N 8.69. Found, %: C 51.87, H 4.39, N 8.41.

Provenance & Evidence