Triethylamine → (1S)-3-cyclooctylacetyl-1,8,8-trimethyl-3-azabicyclo[3.2.1]octane

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Triethylamine 0.24 ml was added in a methylene chloride 10 ml solution of (1S)-1,8,8-trimethyl-3-azabicyclo (3.2.1]octane hydrochloride 0.28 g, and stirred at 0° C. for 30 min. Cyclooctyl acetic acid 0.25 g and WSC 0.40 g were added therein, then temperature of the reaction mixture was gradually changed to room temperature and stirred for 21 hours. The reaction mixture was washed wits saturated aqueous sodium chloride solution and dried by anhydrous sodium sulfate. After filtering the drying agent, the filtrate was concentrated in vacuo to obtain crude (1S)-3-cyclooctylacetyl-1,8,8-trimethyl-3-azabicyclo[3.2.1]octane. The concentrate was added to THP 15 ml solution of lithium aluminum hydride 0.12 g and refluxed for 1 hour. The reaction mixture was cooled, then added water and filtered the insoluble material. The filtrate was concentrated in vacuo. The thus obtained residue was purified by means of silica gel column chromatography (Wako gel, C200, chloroform: acetone=10:1) to obtain the product. Yield: 0.26 g (Yield 61%)

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