Ammonium formate → (9,9-Dimethyl-11-oxa-3,8-diazaspiro[5.5]undecan-3-yl)-(4-isopropoxy-3-methyl-phenyl)methanone

HRID 713139Notes

Reaction equation

C([N:8]1[C:31]([CH3:33])([CH3:32])[CH2:30][O:29][C:10]2([CH2:15][CH2:14][N:13]([C:16]([C:18]3[CH:23]=[CH:22][C:21]([O:24][CH:25]([CH3:27])[CH3:26])=[C:20]([CH3:28])[CH:19]=3)=[O:17])[CH2:12][CH2:11]2)[CH2:9]1)C1C=CC=CC=1.C([O-])=O.[NH4+]>C(O)C.[OH-].[OH-].[Pd+2]>[CH3:33][C:31]1([CH3:32])[CH2:30][O:29][C:10]2([CH2:11][CH2:12][N:13]([C:16]([C:18]3[CH:23]=[CH:22][C:21]([O:24][CH:25]([CH3:27])[CH3:26])=[C:20]([CH3:28])[CH:19]=3)=[O:17])[CH2:14][CH2:15]2)[CH2:9][NH:8]1

Participants

Conditions

Temperature: 40 °C

Procedure

To a solution of (8-benzyl-9,9-dimethyl-11-oxa-3,8-diazaspiro[5.5]undecan-3-yl)-(4-isopropoxy-3-methyl-phenyl)methanone (51 mg, 0.11 mmol) in ethanol (2 mL) was added Pd(OH)2 (16 mg, 0.11 mmol) followed by ammonium formate (29 mg, 0.45 mmol). The reaction mixture was stirred at 40° C. for 18 h, then filtered and concentrated in vacuo to afford (9,9-dimethyl-11-oxa-3,8-diazaspiro[5.5]undecan-3-yl)-(4-isopropoxy-3-methyl-phenyl)methanone (40 mg, 98%). ESI-MS m/z calc. 360.5. found 361.3 (M+1)+; Retention time: 1.29 minutes (3 min run).

Workup

filtrationfiltered
concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-85ac8df7f3ef4dd08495d62f77ad31a2
Source dataset: uspto-grants-2015_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09181273B2

Reaction notes

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