反应详情

The title compound was prepared from 2-cyano-3-methylthio-3-(4-tolyl)acrylamide (425 mg, 1.83 mmol), ethyl hydrazinoacetate hydrochloride (311 mg, 2.01 mmol) and sodium hydroxide (80 mg, 2.01 mmol) following the procedure used for the compound of Example 12. The crude product was subjected to column chromatography (SiO2, 10% methanol in CH2Cl2) and was recrystallised from ethyl acetate to give the title compound as white crystals (152 mg) m.p. 179°. δH (CDCl3) 7.43 (2H, d, J 8.1 Hz), 7.26 (2H, d, J 8.1 Hz), 5.56 (2H, br s), 5.22 (2H, br s), 4.77 (2H, s), 4.27 (2H, q, J 7.2 Hz), 2.40 (3H, s) and 1.32 (3H, t, J 7.2 Hz).

1. customwas recrystallised from ethyl acetate