Sodium Hydroxide → HCID 70561159, compound

Participants

Reaction Steps

To a solution of 7.02 g of benzyl α-(3ξ-carbomethoxy-2-benzoyl-7-oxo-4-oxa-2,6-diazabicyclo[3.2.0]heptan-6-yl)-α-isopropylideneacetate dissolved in a mixture of 85 ml of acetone and 26.5 ml of water is added 20 ml of 1.012 N aqueous solution of sodium hydroxide at -3° to -4° C. over a period of an hour and the mixture diluted with water and washed with ethyl acetate. The aqueous layer is separated, adjusted to pH 2.0 with 4 N hydrochloric acid, and then extracted with ethyl acetate. The extract is washed with water, dried on sodium sulfate, and concentrated under reduced pressure to yield 6.34 g of benzyl α-(3ξ-carboxy-2-benzoyl-7-oxo-4-oxa-2,6-diazabicyclo[3.2.0]heptan-6-yl)-α-isopropylideneacetate as foamy material.

Provenance & Evidence