反应详情

A mixture of tert-butyl 9-benzyl-2,2-dimethyl-1-oxa-4,9-diazaspiro[5.5]undecane-4-carboxylate (Example 271, step b) (0.8 g) dissolved in ethanol (50 mL) and 10% palladium on carbon (0.5 g) was treated with ammonium formate (0.8 g) and the reaction mixture heated at reflux for 30 minutes. The mixture was cooled to room temperature and filtered through diatomacious earth. The solvent was evaporated and the residue azeotroped with acetonitrile (×2) to afford the subtitled compound. Yield 0.55 g.

1. temperaturethe reaction mixture heated
2. temperatureat reflux for 30 minutes
3. filtrationfiltered through diatomacious earth
4. customThe solvent was evaporated
5. customthe residue azeotroped with acetonitrile (×2)