Aluminum → Methyl alpha-(3xi-carbobenzoxy-7-oxo-4-oxa-2,6-diazabicyclo[3.2.0]heptan-6-yl)-alpha-isopropylideneacetate

Participants

Reaction Steps

To a solution of 5.00 g of methyl α-(3-carbobenzoxy-7-oxo-4-oxa-2,6-diazabicyclo[3.2.0]hept-2-en-6-yl)-α-isopropylideneacetate in 100 ml of tetrahydrofuran containing 5% water is added aluminium amalgam prepared from 4 g of aluminium and 0.5 g of mercuric chloride, and the mixture stirred at room temperature for 1.5 hours. The reaction mixture is dried on magnesium sulfate and concentrated under reduced pressure to yield 4.92 g of methyl α-(3ξ-carbobenzoxy-7-oxo-4-oxa-2,6-diazabicyclo[3.2.0]heptan-6-yl)-α-isopropylideneacetate as crude product in 98.4% yield.

Provenance & Evidence