References
- Nakagawa , M. , Kiuchi , M. , Obi , M. , Tonozuka , M. , Kobayashi , K. , Hino , T. and Ban , Y. 1975 . Chem. Pharm. Bull. , 23 : 304 Y. Tamura, M. Kunitomo, T. Masui, and M. Terashima, Chem. Ind. (London), 168 (1972); R.J. Sundberg, P.A. Bukowick, and F.O. Holcombe, J. Org. Chem., 32, 2938 (1968); B.S. Joshi, V.N. Kamat, and A.K. Saksena, Tetrahedron Lett., 2395 (1968); E. Winterfeldt, Chem. Ber., 97, 2463 (1964)
- Katvalyan , G. T. , Semenova , N. A. and Mistryukov , E. A. 1976 . Izv. Akad. Nauk SSSR, Ser. Khim. , : 129 The C-substituted analogues have been found in some literatures: see, for example, [C.A., 84, 164577d (1976) J; F.E. Ziegler and G.B. Bennett, Tetrahedron Lett., 2545 (1970)
- Krow , G. R. and Fan , D. M. 1974 . J. Org. Chem. , 2 : 2674 An alternative preparation of 4 by the acylation of 1,2,3,6-tetrahydropyridine has been reported: see
- Nakanishi , M. and Arimura , K. 1970 . J. Pharm. Soc. Japan , 90 : 1324
- Ibuka , T. , Masaki , N. , Saji , I. , Tanaka , K. and Inubushi , Y. 1975 . Chem. Pharm. Bull. , 23 : 2779 The regioisomer (c) failed to be isolated. A regioselective hydrobromination of an olefin hasbeen described: see
- If the product is El, the C-5 proton signals should appear in the field much higher than 3.2 ppm