Pyridinium Dichromate: A Novel Reagent for the Oxidation of Steroidal Δ⁵-3β-Alcohols to the Corresponding Δ⁴-3, 6-Diketones

References and Notes

• Alexander von Humboldt Research Fellow . 1994–1995 . Ibadan, , Nigeria : Department of Chemistry University of Ibadan . On leave from
   Google Scholar
• Sharpless , K. B. , Akashi , K. and Oshima , K. 1979 . Tett. Lett. , : 2503
   Google Scholar
• Muller , P. and Godoy , J. 1981 . Tett. Lett. , 22 : 2361
   Web of Science ®Google Scholar
• Green , G. , Griffith , W. P. , Hollinshead , D. M. , Ley , S. V. and Schroder , M. 1984 . J. Chem. Soc. Perkin Trans 1 , : 681
   Google Scholar
• Miranda Moreno , M. J. S. , Saè Melo , M. L. and Campos , N. A. S. 1991 . Tett. Lett. , 32 : 3201
   Google Scholar
• Acosta , C. K. , Rao , P. N. and Kim , H. K. 1993 . Steroids , 58 : 205
   PubMedGoogle Scholar
• Corey , E. J. and Schmidt , G. 1979 . Tett. Lett. , 5 : 399
   Google Scholar
• Parish , E. J. , Kizito , S. A. and Heidepriem , R. W. 1993 . Synth. Commun. , 23 : 223
   Web of Science ®Google Scholar
• Blaszezyk , K. and Paryzek , Z. 1994 . Synth. Commun. , 24 : 3255
   Web of Science ®Google Scholar
• Schabdach , H. 1995 . J. Prakt. Chem. , 337 : 68
   Google Scholar
• Covey , D. F. and Hood , W. F. 1981 . Endocrinology , 108 : 1597
   PubMedGoogle Scholar
• Numazawa , M. , Mutsumi , A. and Kigawa , H. 1990 . Chem. Pharm. Bull. (Tokyo) , 38 : 3076
   PubMedGoogle Scholar
• Numazawa , M. , Mutsumi , A. , Asano , N. and Ito , Y. 1993 . Steroids , 58 : 40
   PubMedGoogle Scholar
• Fieser , L. F. and Fieser , M. 1959 . “ Steroids ” . N.Y. : Reinhold Publishing Corp. . references therein
   Google Scholar
• Dauben , W. G. , Lorber , M. and Fullerton , D. S. 1969 . J. Org. Chem. , 34 : 3587 This presumed step is essentially an allylic oxidation of olefin. For details of the mechanism of allylic oxidation of olefins by chromium (VI) reagents, see, and references therein
   Web of Science ®Google Scholar
• Still , W. C. , Kahn , M. and Mitra , A. 1978 . J. Org Chem. , 43 : 2923
   Web of Science ®Google Scholar