反应详情

To a suspension of hydroxylamine hydrochloride (0.27 g, 3.88 mmol) in tetrahydrofuran (5 ml) a saturated NaHCO3 solution (3 ml) was added and the resultant mixture was stirred at ambient temperature for 10 min. To the reaction mixture a solution of crude 3-{3-[(E)-2-phenylethenesulfonylamino]phenyl}acryloyl chloride (27a) (0.27 g, 0.77 mmol) in tetrahydrofuran (3.5 ml) was added and the mixture was stirred at ambient temperature for one hour. The reaction mixture was partitioned between ethyl acetate and 2N HCl. The organic layer was washed successively with water and saturated NaCl, then the solvent was removed. The residue was crystallised from ethyl acetate and washed with diethyl ether affording the title compound (0.115 g, 42%) as white crystals. M.p. 171° C. 1H NMR (DMSO-d6, HMDSO) δ: 6.38 (d, J=16.0 Hz, 1H); 7.07-7.80 (m, 12H); 9.03 (br s, 1H); 10.16 (s, 1H); 10.76 (br s, 1H). HPLC analysis on Symmetry C18 column: impurities 1% (column size 3.9×150 mm; mobile phase acetonitrile—0.1M phosphate buffer (pH 2.5), 35:65; sample concentration 0.4 mg/ml; flow rate 1.2 ml/min; detector UV 254 nm). Anal. Calcd for C17H16N2O4S, %: C 59.29, H 4.68, N 8.13. Found, %: C 59.13, H 4.70, N 7.92.

1. additionwas added
2. customThe reaction mixture was partitioned between ethyl acetate and 2N HCl
3. washThe organic layer was washed successively with water and saturated NaCl
4. customthe solvent was removed
5. customThe residue was crystallised from ethyl acetate
6. washwashed with diethyl ether affording the title compound (0.115 g, 42%) as white crystals