2,3-dioxabicyclo[2.2.2]oct-7-en-5-one: Synthesis and reactions of the keto endoperoxide of phenol


Adam W., Balci M. , Kilic H.

JOURNAL OF ORGANIC CHEMISTRY, cilt.65, ss.5926-5931, 2000 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 65 Konu: 19
  • Basım Tarihi: 2000
  • Doi Numarası: 10.1021/jo000120p
  • Dergi Adı: JOURNAL OF ORGANIC CHEMISTRY
  • Sayfa Sayıları: ss.5926-5931

Özet

The photooxygenation of 1,4-cyclohexadiene (3) affords the diastereomeric hydroperoxy endoperoxides exo-4 and endo-4 and the diastereomeric hydroperoxides trans-5 and cis-5 in a ratio of 87: 9:3.5:0.5. Selective reduction of hydroperoxide group in the endoperoxides exo-4 and endo-4 in the presence of titanium tetraisopropoxide-diethyl sulfide gave the corresponding hydroxy endoperoxides exo-7 and endo-7, which on PCC oxidation leads to the phenol-derived keto endoperoxide 2. The triphenylphosphine deoxygenation of the keto endoperoxide 2 produces a 9:1 mixture of 1,2- and 1,4-dihydroxybenzenes 10 and 11, while the CoTPP-catalyzed rearrangement affords the bisepoxide 12, malealdehyde (13), and beta-lactone 14. The mechanisms of these transformations are presented.