Hydrochloric Acid → HCID 131711504, compound

Participants

Reaction Steps

A mixture of 470 mg of the product of Step C, 5 ml of methylene chloride and 130 ml of dicyclohexylcarbodiimide was rinsed with a little methylene chloride and the mixture was stirred for an hour at room temperature. The mixture was vacuum filtered to remove the dicyclohexylurea formed and the filtrate was cooled. A solution of 136 mg of 7-amino-cephalosporanic acid, 2.4 ml of methylene chloride and 0.14 ml of triethylamine was added to the filtrate under an inert atmosphere and the mixture sat for 11/2 hours at room temperature. 2 ml of 1N hydrochloric acid and water were added thereto and the mixture was stirred and decanted. The organic phase was washed with water, dried and evaporated to dryness to obtain 610 mg of raw 3-acetoxymethyl-7-[2-(2-tritylamino-4-thiazolyl)-2-(2-propenyl) oxyiminoacetamido]-ceph-3-eme-4-carboxylic acid with a syn configuration.

Provenance & Evidence