反应详情

To 3.0 g (14.0 mmol) of benzenesulfonyl-acetic acid hydrazide in 30 mL of phosphorus oxychloride, 1.47 g (17.0 mmol, 1.2 eq) of cyclopropanecarboxylic acid were added, and heated at reflux for 2 hours. The reaction mixture was very carefully poured onto ice, extracted with EtOAc, filtered and evaporated. Column chromatography on silica gel with EtOAc/heptane 2:1 yielded 1.49g (41%) of 2-benzenesulfonylmethyl-5-cyclopropyl-[1,3,4]oxadiazole as a white solid, MS: 265 (MH+).

1. temperatureheated
2. temperatureat reflux for 2 hours
3. additionThe reaction mixture was very carefully poured onto ice
4. extractionextracted with EtOAc
5. filtrationfiltered
6. customevaporated