Reaction #160053

Reaction equation

hydrogen

acetic acid

1-(8-benzyl-10,10-dimethyl-11-oxa-3,8-diazaspiro[5.5]undecan-3-yl)-2,2,2-trifluoro-ethanone

HCl

→

1-(10,10-dimethyl-11-oxa-3,8-diazaspiro[5.5]undecan-3-yl)-2,2,2-trifluoro-ethanone acetic acid salt

Solvents

ethanol

Conditions

Workup

1. 1
   FiltrationThe reaction mixture was filtered
2. 2
   Washthe catalyst was washed with methanol
3. 3
   Concentrationconcentrated in vacuo

Procedure

A mixture of acetic acid (100 μL, 1.76 mmol), Pd(OH)2 (11 mg, 0.02 mmol), 1-(8-benzyl-10,10-dimethyl-11-oxa-3,8-diazaspiro[5.5]undecan-3-yl)-2,2,2-trifluoro-ethanone (80 mg, 0.22 mmol), HCl (108 μL of 4 M in dioxane, 0.43 mmol) and ethanol (2 mL) was treated to an atmosphere of hydrogen at 85 psi for 3 days. The reaction mixture was filtered and the catalyst was washed with methanol, then concentrated in vacuo to give 1-(10,10-dimethyl-11-oxa-3,8-diazaspiro[5.5]undecan-3-yl)-2,2,2-trifluoro-ethanone acetic acid salt as a yellow solid. ESI-MS m/z calc. 280.1. Found 281.5 (M+1)+; Retention time: 0.91 minutes (3 min run).

Source