1,1'-(Diazomethylene)bis(benzene) → HCID 14525271, compound

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Reaction Steps

To a stirred solution of 3.5 g of 3-formyl-7-thienylacetamido-3-cephem-4-carboxylic acid in 100 ml of tetrahydrofuran is added 2.3 g of diphenyldiazomethane, and the stirring is continued for 30 min. The solvent is distilled off under reduced pressure, and the residue is washed with petroleum ether to give 4.9 g of the corresponding 3-formyl-3-cephem-4-carboxylic acid benzhydryl ester.

Provenance & Evidence