Sodium Iodide → HCID 131720388, compound

Participants

Reaction Steps

After 20.0 g of p-methoxybenzyl 7β-[2-phenylacetamido]-3-[3-chloro-1-propenyl]-3-cephem-4-carboxylate (E/Z=25/75) was suspended in 250 ml of acetone, 29 g of sodium iodide was added to the suspension. The mixture was reacted at 25°-30° C. for 3 hours, while stirring. After the reaction was completed, the solution was concentrated at a temperature below 25° C. under a reduced pressure of 100 mmHg and 60 ml of acetone was distilled off. The formed crystals were collected by filtration and washed successively with 50 g of 5% sodium thiosulfate aqueous solution, next with 50 g of ion exchange water and finally with 50 g of acetone to give 14.24 g of p-methoxybenzyl 7β-[2-phenylacetamido]-3-[3-iodo-1-propenyl]-3-cephem-4-carboxylate (content, 97.0%; E/Z=99/1). The yield of E-form was 59%.

Provenance & Evidence