反应详情

温度

25 °C

To a solution of benzoic acid hydrazide (5.70 g, 0.042 mol) in tetrahydrofuran (75 mL) was added acetophenone (5.5 g, 0.046 mol) followed by concentrated. HCl (3 drops). The reaction was allowed to stir for 12 h at 25° C. during which time the product precipitated as a colorless crystalline solid. The product was filtered, washed with tetrahydrofuran (1×30 mL), diethyl ether (3×60 mL) and pentane (2×60 mL), and the crystalline solids were dried in vacuo (6.65 g, 64%). 1H NMR (CD2Cl2): δ2.35 (s, 3H, CH3), 7.30-8.0 (m, 10H, Ph), 9.0 (br, 1H, NH). All other substrates were prepared in a similar fashion.

1. concentrationby concentrated
2. customprecipitated as a colorless crystalline solid
3. filtrationThe product was filtered
4. washwashed with tetrahydrofuran (1×30 mL), diethyl ether (3×60 mL) and pentane (2×60 mL)
5. customthe crystalline solids were dried in vacuo (6.65 g, 64%)
6. customAll other substrates were prepared in a similar fashion