Ammonium formate → Tert-butyl 9-phenyl-11-oxa-3,8-diazaspiro[5.5]undecane-3-carboxylate

Participants

Reaction Conditions

Reaction Steps

To tert-butyl 8-[(4-methoxyphenyl)methyl]-9-phenyl-11-oxa-3,8-diazaspiro[5.5]undecane-3-carboxylate (500 mg, 1.11 mmol), Pd (500 mg, 4.70 mmol) and ammonium formate (697 mg, 11.05 mmol) was added methanol. The reaction mixture was then heated at 70° C. for 16 hours. The reaction mixture was filtered through a plug of celite and the solvent was concentrated in vacuo to obtain tert-butyl 9-phenyl-11-oxa-3,8-diazaspiro[5.5]undecane-3-carboxylate (340 mg, 93%) as an oil. ESI-MS m/z calc. 332.4. found 333.5 (M+1)+; Retention time: 1.21 minutes (3 min run).

Provenance & Evidence