Water → p-Nitrobenzyl alpha-(3-phenoxymethyl-7-oxo-4-thia-2,6-diazabicyclo(3,2,0)hept-2-en-6-yl)-alpha-(1-morpholinoethylidene)acetate

Participants

Reaction Steps

To a solution of p-nitrobenzyl α-[3-phenoxymethyl-7-oxo-4-thia-2,6-diazabicyclo[3,2,0]hept-2-en-6-yl]-α-(1-methanesulfonylethylidene)acetate (298 mg) in benzene (3 ml) is added morpholine (0.095 ml) at 7° to 10° C. After 130 minutes, the reaction mixture is filtered to give filtrate, which is poured into iced water, and is extracted with methylene chloride. The extract solution is washed with water, dried over magnesium sulfate, and evaporated to give p-nitrobenzyl α-[3-phenoxymethyl-7-oxo-4-thia-2,6-diazabicyclo[3,2,0]hept-2-en-6-yl]-α-(1-morpholinoethylidene)-acetate (284 mg). Foam. Yield: 97.1%.

Provenance & Evidence