反应详情

N′-(chloroacetyl)-3-cyanobenzohydrazide (795 mg, 3.34 mmol) and P2O5 (4.7 g, 33.4 mmol) were added to DMF (6 ml) and toluene (4 ml). The reaction mixture was refluxed for 2 h. K2CO3 (aq., sat.) was added until pH was basic and the mixture was extracted with DCM. The combined organic layers were dried (Na2SO4) and purified with flash chromatography using 0 to 100% EA in hep. to give the title compound (209 mg, 29%). 1H NMR: 8.29 (m, 2 H), 7.82 (m, 1 H), 7.66 (t, 1 H), 4.78 (s, 2 H).

1. temperatureThe reaction mixture was refluxed for 2 h
2. extractionthe mixture was extracted with DCM
3. dry with materialThe combined organic layers were dried (Na2SO4)
4. custompurified with flash chromatography