Sulfuric Acid → trans-4-Acetyl-3-[1-(tert-butyldimethylsilyloxy)ethyl]-2-azetidinone

Beteiligte Stoffe

Reaktionsschritte

trans-3-[1-(tert-Butyldimethylsilyloxy)ethyl]-4-trimethylsilylethynyl-2-azetidinone (1.2 g) is dissolved in a mixture of tetrahydrofuran (20 ml) and water (2 ml), and mercury sulfate (0.07 g) and concentrated sulfuric acid (catalytic amount) are added, followed by stirring at room temperature for 15 hours. The reaction mixture is poured into a mixture of ethyl acetate (150 ml) and water (100 ml) and the organic layer is separated, washed with aqueous sodium chloride, dried over magnesium sulfate and concentrated under reduced pressure to give 0.60 g of trans-4-acetyl-3-[1-(tert-butyldimethylsilyloxy)ethyl]-2-azetidinone.

Herkunft & Nachweise