反应详情

122 mg (1.45 mmol) of sodium hydrogencarbonate were added to 6 ml of a methylene chloride solution containing 304 mg (0.486 mmol) of 4-nitrobenzyl (1R,5S,6S)-2-(2-diethylcarbamoylphenylthio)-1-methyl-6-[1(R)-trimethylsilyloxyethyl]-1-carbapen-2-em-3-carboxylate (prepared as described in Example 34). The mixture was then placed in an ice bath while 105 mg (0.487 mmol) of m-chloroperbenzoic acid (80% purity) were added, with stirring. The reaction mixture was stirred for 1 hour at the same temperature, after which it was diluted with methylene chloride and washed with an ice-cooled dilute aqueous solution of sodium hydrogencarbonate. The solvent was then removed by distillation under reduced pressure. The resulting residue was purified by column chromatography through 25 g of silica gel. Elution with a 2:1 by volume mixture of ethyl acetate and hexane afforded 260 mg (yield 83%) of the title compound as a foam-like solid.

1. additionwere added
2. stirringThe reaction mixture was stirred for 1 hour at the same temperature
3. washwashed with an ice-
4. temperaturecooled dilute aqueous solution of sodium hydrogencarbonate
5. customThe solvent was then removed by distillation under reduced pressure
6. customThe resulting residue was purified by column chromatography through 25 g of silica gel
7. washElution with a 2:1
8. additionby volume mixture of ethyl acetate and hexane