A new method for the synthesis of stipitatic acid isomers: Photooxygenation of ethyl 6H-cyclohepta[d][1,3]dioxole-6-carboxylate


Dastan A., Saracoglu N., Balci M.

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, ss.3519-3522, 2001 (SCI İndekslerine Giren Dergi) identifier identifier

  • Basım Tarihi: 2001
  • Dergi Adı: EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
  • Sayfa Sayıları: ss.3519-3522

Özet

Photooxygenation of the cycloheptatriene derivative 9 gave the bicyclic endoperoxide 14. Cleavage of the peroxide linkage in 14 with thiourea resulted in the formation of 16. Treatment of the endoperoxide 14 with a catalytic amount of triethylamine provided a new isomer of stipitatic acid 11, and 16. Pyrolysis or the CoTPP (TPP = tetraphenylporphyrin) catalyzed reaction of 14 resulted in the formation of iso-stipitatic acid 10, and 18,