反应详情

温度

-50 °C

A solution of 439 mg (1.0 mmol) of p-nitrobenzyl 2-(4-tert-butylthio-2-oxo-1-azetidinyl)-4,4-dimethyl-3-oxopentanoate in 20 ml of dry methylene chloride is cooled to -50° C. and a solution of 166 mg of chlorine in 1.6 ml of carbon tetrachloride is added. After stirring for 30 minutes at -50° C., the solvent is evaporated in vacuo and the residue is recrystallized from methylene chloride/hexane, the product (348 mg) being obtained as a crystalline solid as a 6:4 mixture of the two diastereomeric title compounds.

1. customthe solvent is evaporated in vacuo
2. customthe residue is recrystallized from methylene chloride/hexane