2-Chloro-N,N-diethyl-1,1,2-trifluoroethan-1-amine → 7-[2-(2-Thienyl)acetamido]-3-fluoro-3-cephem-4-carboxylic acid

Beteiligte Stoffe

Reaktionsschritte

To a solution of 325 mg. (0.7 mmole) of p-nitrobenzyl 7-[2-(2-thienyl)acetamido]-3-hydroxy-3-cephem-4-carboxylate in 10 ml. of methylene chloride was slowly added an equivalent amount of N-(2-chloro-1,1,2-trifluoroethyl) diethylamine. The reaction mixture was heated for 30 minutes under gentle reflux and was then evaporated to dryness in vacuo. The residue was dissolved in a mixture of ethyl acetate-water and the organic layer was separated. The organic layer was washed with 5% hydrochloric acid, water and brine and was then dried. The dried reaction product solution was concentrated to a small volume and n-hexane was added to precipitate, p-nitrobenzyl 7-[2-(2-thienyl)acetamido]-3-fluoro-3-cephem-4-carboxylate.

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