Synthesis of Aminophosphonate Derivatives Containing 7-Aminocephalosporanic acid

7-Aminocephalosporanic acid를 포함하는 Aminophosphonate유도체의 합성

  • 김상범 (한국가스공사 연구개발원)
  • Received : 1997.05.27
  • Accepted : 1997.06.19
  • Published : 1997.08.10

Abstract

7-Aminocephalosporanic acid(7-ACA) was reacted with diphenyldiazomethane(DPM) to get diphenylmethyl 7-$\beta$-(O-ethylphthalimidomethylphosphony1)-3-acetoxymethyl-3-cephem-4-carboxylate. Diethyl phthalimidomethylphosphonate was chloridated with a slight excess of phosphorus pentachloride to the O-ethyl phthalimidoalkylphosphonochloridate. Previously unreported two compounds, diphenylmethy1 -7-$\beta$-(O-ethylphthalimidomethylphosphony1)-3-acetoxymethyl-3-cephem-4-carboxylate and diphenylmethyl-7-$\beta$-[O-ethylphthalimidoethylphosphonyl]-3-acetoxymethyl-3-cephem-4-carboxylate were synthesized by cupling reaction of DPM 7-ACA and O-ethyl phthalimidoalkylphosphonochloridate. All of the compounds including starting materials and reaction intermediates were characterized by $^1H$ NMR and FT-IR spectroscopy.

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