Acetic Acid → HCID 131711546, compound

Participants

Reaction Steps

To a solution of 200 mg of diphenylmethyl α-(3ξ-diazoacetyl-2-phenylacetyl-7-oxo-4-oxa-2,6-diazabicyclo[3.2.0]-heptan-6-yl)-α-isopropylideneacetate in 2 ml of acetic acid is added 0.045 ml of boron trifluoride etherate. After the termination of gas evolution, the reaction mixture is poured into ice water and extracted with ethyl acetate. The extract is washed with water, an aqueous solution of sodium hydrogencarbonate and then water, dried on sodium sulfate and evaporated. The residue (205 mg) is purified by thin-layer chromatography to yield 65 mg of diphenylmethyl α-(3ξ-acetoxyacetyl-2-phenylacetyl-7-oxo-4-oxa-2,6-diazabicyclo[3.2.0]heptan-6-yl)-α-isopropylideneacetate in 30% yield.

Provenance & Evidence