References
- Financial support from the Merck Foundation for Faculty Development and the donors of the Petroleum Research Fund, administered by the American Chemical Society, is gratefully acknowledged. We are also indebted to Dr. David Rosenthal and Mr. Fred Williams of the Research Triangle Institute for Mass Spectrometry (supported by NIH grant RR 00330) for mass spectral determinations
- Smedman , L. and Zavarin , E. 1968 . Tetrahedron Lett. , : 3833
- Nayak , U. R. and Dev , S. 1963 . Tetrahedron Lett. , : 243
- Kido , F. , Sakuma , R. , Uda , H. and Yoshikoshi , A. 1969 . Tetrahedron Lett. , : 3169
- Roberts , J. D. , Bennett , W. and Armstrong , R. 1950 . J. Amer. Chem. Soc. , 72 : 3329
- Winstein , S. , Walborsky , H. M. and Schreiber , K. C. 1950 . J. Amer. Chem. Soc. , 72 : 5795
- Trahanovsky , W. S. and Doyle , M. P. 1968 . Tetrahedron Lett. , : 2155
- Raber , D. J. , Dukes , M. D. and Gregory , J. 1974 . Tetrahedron Lett. , : 667 for leading references concerning trifluoroethanol as a solvolysis medium, see
- Felkin , H. and Lion , C. 1968 . Chem. Commun. , : 60
- Felkin , H. and Lion , C. 1971 . Tetrahedron , 27 : 1387
- Peterson , P. E. and Kamat , R. J. 1969 . J. Amer. Chem. Soc. , 91 : 4521
- Hanack , M. and Stutz , H. 1974 . Tetrahedron Lett. , : 2457
- Markezich , R. L. , Willy , W. E. , McCarry , B. E. and Johnson , W. S. 1973 . J. Amer. Chem. Soc. , 95 : 4414 and accompanying communications;
- Hanack , M. , Harding , C. E. and Derocque , J. L. 1972 . Chem. Ber. , 105 : 421
- Johnson , W. S. , Gravestock , M. B. , Parry , R. J. , Meyers , R. F. , Bryson , T. A. and Miles , D. H. 1971 . J. Amer. Chem. Soc. , 93 : 4330 and accompanying communication
- Closson , W. D. and Roman , S. A. 1966 . Tetrahedron Lett. , : 6015
- Baldwin , S. W. and Tomesch , J. C. 1975 . Tetrahedron Lett. , : 1055
- The determination of the tricyclic/tetracyclic product ratio was made by glc analysis of the crude product mixtures and by integration of characteristic peaks in the nmr spectra. We are confident of the reported ratios to within 5%