1. R. C. Cookson, Chem. and Ind.1953, 337. It is suggested that compared to decalin thecis trans energy difference may be greater in quinolizidine because it has one less angular hydrogen.
2. F. Bohlmann, Chem. Ber.91, 2157 (1958).
3. N. J. Leonard andW. K. Musker, J. Amer. chem. Soc.82, 5148 (1960).
4. T. M. Moynehan et al., Proc. chem. Soc.1961, 218.
5. M. Aroney andR. J. W. Le Fevre, Proc. chem. Soc.1958, 82; J. chem. Soc.1958, 3002; J. chem. Soc.1960, 2161. See alsoD. H. R. Barton andR. C. Cookson, Quart. Rev.10, 44 (1956).