反应详情

To a solution of trans-3-{4-[2-(tert-butoxycarbonyl-methyl-amino)-ethyl]-cyclohexyl}-propionic acid ethyl ester in 40 ml of tetrahydrofuran was added under ice-cooling 547 mg (14.0 mmol) of lithium aluminium hydride in small portions. The reaction mixture was then stirred for 1 hour at room temperature. To destroy the excess of lithium aluminium hydride, 50 ml of brine was added to the reaction mixture under ice-cooling. It was then partitioned between ether and water, the organic layer was dried over magnesium sulfate and concentrated under reduced pressure giving 3.35 g (100% over 2 stepts) nearly pure trans-{2-[4-(3-hydroxy-propyl)-cyclohexyl]-ethyl}-methyl-carbamic acid tert-butyl ester as colorless viscous oil, MS. 317 (MNH4+).

1. customTo destroy the excess of lithium aluminium hydride, 50 ml of brine
2. additionwas added to the reaction mixture under ice-
3. temperaturecooling
4. customIt was then partitioned between ether and water
5. dry with materialthe organic layer was dried over magnesium sulfate
6. concentrationconcentrated under reduced pressure