Hydrochloric Acid → HCID 131711537, compound

Participants

Reaction Steps

To a solution of 11.3 g of diphenylmethyl α-(3ξ-carbomethoxy-2-phenylacetyl-7-oxo-4-oxa-2,6-diazabicyclo[3.2.0]heptan-6-yl)-α-isopropylideneacetate in 230 ml of acetone is added a solution of 900 mg of sodium hydroxide in 36 ml of water under ice-cooling, and the mixture stirred for 1 hour, then diluted with water, acidified with hydrochloric acid, and then extracted with methylene chloride. The extract is washed with water, dried on magnesium sulfate and concentrated under reduced pressure to yield 12.54 g of diphenylmethyl α-(3ξ-carboxy-2-phenylacetyl-7-oxo-4-oxa-2,6-diazabicyclo[3.2.0]-heptan-6-yl)-α-isopropylideneacetate as crude product.

Provenance & Evidence