Sodium Chloride → HCID 13174771, compound

Participants

Reaction Conditions

Reaction Steps

A 86.6 g quantity of 6,6-dibromo-2,2-dimethylpenam-3-carboxylic acid 1-oxide diphenylmethyl ester (Compound 1) [compound of the formula (1) wherein X═Y═Br, R=diphenylmethyl, n=1] was dissolved in 300 mL of dichloromethane. To the solution was added 36 mL of methanol with stirring and then added a suspension of 1.05 g of metal bismuth in 112 mL of 20% aqueous solution of sodium chloride. While maintaining at 20 to 25° C., to the mixture was added 10 g of aluminum powder, each 1 g, at intervals of 10 minutes, thereafter the mixture was refluxed with heating. After 23.5 hours, the reaction mixture was cooled to room temperature, an organic layer was separated and washed with diluted hydrochloric acid and 5% aqueous solution of sodium chloride. The organic layer was concentrated to give 2,2-dimethylpenam-3-carboxylic acid 1-oxide diphenylmethyl ester (Compound 2) [compound of the formula (2) wherein R=diphenylmethyl, n=1].

Provenance & Evidence