References
- Grieco , P. A. and Finkelhor , R. S. 1973 . J. Org. Chem. , 38 : 2909 J. Alexander and G. S. Krishna Rao, Flavor Ind. 4, 390 (1973) for leading references
- Thomas , A. F. and Willhalm , B. 1967 . Helv. Chim. Acta , W. R. Vaughan and R. Perry, Jr., J. Amer. Chem. Soc. 74, 5355 (1952). The exo- endo ratio of the adducts is reversed in the catalyzed reaction the endo epimer being predominant (x:n ≃ 4:6 by pmr)
- I am grateful to Dr. A. F. Thomas (Firmencih Cie.) for providing copies of pmr spectra of the pure epimers