反应详情

To a solution of allyl (4R,5S,6S)-3-[(2S,4S)-1-allyloxycarbonyl-2-(2-fluoroethyloxymethyl)pyrrolidin-4-yl]thio-6-[(1R)-1-(t-butyldimethylsilyloxy)ethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (250 mg) in tetrahydrofuran (5 ml) were added 1M tetrabutylammonium fluoride in tetrahydrofuran (1.2 ml) and acetic acid (0.8 ml), and the solution was stirred at room temperature for 23 hours. Water (10 ml) and ethyl acetate (10 ml) were added and stirred for 5 minutes. The organic layer was separated washed with brine (10 ml), dried and evaporated to give an oily residue, which was chromatographed on silica gel eluting with a mixture of n-hexane and ethyl acetate (1:1 V/V) to give allyl (4R,5S,6S)-3-[(2S,4S)-1-allyloxycarbonyl-2-(2-fluoroethyloxymethyl)pyrrolidin-4-yl]thio-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene- 2-carboxylate (110 mg), which was identified by comparison of the infrared spectrum with that of an authentic sample. ##STR29##

1. stirringstirred for 5 minutes
2. customThe organic layer was separated
3. washwashed with brine (10 ml)
4. customdried
5. customevaporated
6. customto give an oily residue, which
7. customwas chromatographed on silica gel eluting with a mixture of n-hexane and ethyl acetate (1:1 V/V)