反应详情

A mixture of mineral oil free NaH (0.86 g, 21.4 mmol) and DMF (15 ml) was cooled in an ice-bath and cyclobutanol (1.6 ml, 20.5 mmol) was added in one portion. The mixture was slowly warmed to room temperature and was stirred for 45 minutes. The mixture was once again cooled in an ice-bath and 3-chloro-4-cyanopyridine (2.6 g, 18.6 mmol) was added in one portion. The mixture was warmed to room temperature and was stirred for 3 hours. Water (10 ml) was added and the solvent was removed in vacuo. Water (225 ml) was aded to the residue and the mixture was extracted with ether (3×100 mL). The combined organic layers were dried over anhydrous MgSO4, treated with charcoal and removed in vacuo to afford 3.0 g (95%) of 3-cyclobutyloxy-4-cyanopyridine as a white solid.

1. temperaturewas cooled in an ice-bath
2. temperatureThe mixture was once again cooled in an ice-bath
3. temperatureThe mixture was warmed to room temperature
4. stirringwas stirred for 3 hours
5. customthe solvent was removed in vacuo
6. extractionthe mixture was extracted with ether (3×100 mL)
7. dry with materialThe combined organic layers were dried over anhydrous MgSO4
8. additiontreated with charcoal
9. customremoved in vacuo