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

HRID 73053Notes

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-0eb4137465144c72aa17ab5fd0f37be6
Source dataset: uspto-grants-2014_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08828996B2

Reaction notes

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