Studies on the synthesis of tetracyclic indole alkaloids. Synthesis of azocino [4,3-b] indole framework

References (1)

1. Harris M.,. 'Besselievre R, Grierson D. S. and Husson H. P. Total Synthesis of (±) Tubifoline. Tetrahedron Lett., 22, 331, 1981. 2.Amat M, Coll M. D., Bosch J., Espinosa E. and Molins E. Total Synthesis of the Strychnos Alkaloids (-)-Tubifoline, (-)-Tubifolidine and (-)-19,20 dihydroakuammicine. Tetrahedron, 8, 935, 1997. 3.Amat M., Linares A., Salaş M. L., Alveres M. and Bosch J. A New Strategy for the Synthesis of Pentacyclic Strychnos Alkaloids: Synthesis of (±)-Tubifolidine. J. Chem. Soc. Chem.Commun., 420, 1988. 4.Patir S., Rosenmund P. and Götz P. H. A New Synthetic Route to the Pentacyclic Indole Alkaloids. Heterocycles, 43, 15, 1996. 5.Patir S., A New Synthetic Route to the Azocino (4,3-b)indole Core Structure. Ann., 1561, 1995. 6.Fritz H., Jamarani M. S., Bats J. W. and Teuber H. J.Synthese des azocino (4,3-b)indole grundgerustus von Strychnos-alkaloiden. Ann., 705, 1993- 7.Ergün Y., Patir S. and Okay G. Synthesis of the Azocino(4,3-)indole Core Structure for the Synthesis of Strychnos Alkaloids. J. Heterocyclic Chem., 2, 315,2002. 8.Amat M., Linares A. and Bosch J. First Total Synthesis and NMR Data of the Strychnos Alkaloid 19,20-dihydroakuammicine. Tetrahedron Lett., 30, 2293, 1989. 9.Amat M., Linares A., Munoz J. and Bosch J. Synthesis and NMR Data of the Strychnos Indole Alkaloid Tubifoline. Tetrahedron Lett., 29,6373, 1988. 10.Amat M., Alvares M., Bonjoch J., Casamitjana "N., Gracia J., Lavilla R„ Garcias X. and Bosch J. Dimethyl(methylthio) sulfoniumfluoroborate induced cyclization of dithioacetals upon 2,3-disubstituted indoles. Tetrahedron Lett., 31,3453, 1990. 11.Dolby L. J. and Nelson S. J. Model Studies of the Synthesis of Echitamine and Related Indole Alkaloids. J. Org. Chem., 88, 2882, 1973. 12.Oikawa Y., Tanaka M.; Hirasawa H. and Yonemutsu O. Reactions and Synthetic Applications of (3-keto sulfoxides IX. Synthesis of 5-methylthio and 5-methoxy Analogs of Ellipticine. Heterocycles, 15,207, 1981. 13.Patir S., Okay G., Gülce A., Salih B. and Hökelek T. Intermediates for the Synthesis of Tetracyclic Indole Alkaloids. Synthesis of 4-amino Tetrahydro Carbazole Derivatives. J. Heterocyclic Chem., 34, 1239,1997. 14.Oikawa Y. and Yonemitsu O. Selective Oxidation of the Side Chain at C-3 of Indoles. J. Org. Chem., 28, 1213, 1977. 15.Patir S. and Götz P. H. Synthese von 4-amino-tetrahydrocarbazol-l-on Derivaten. Ann., 1323, 1993. 16.Ergün Y., Bayraktar N., Patir S. and Okay G. Intermediates for the Synthesis Indole Alkaloids. Synthesis of