Effective preparation of olivacine and ellipticine via late-stage D-ring cyclization is described. Key features of the synthetic routes include trifluoroacetic acid-mediated formation of a lactone that is fused to a tetrahydrocarbazole derivative and its one-pot two-step ring opening and aromatization mediated by para-toluenesulfonic acid and palladium on carbon, respectively.
3. Complexes of polynitro-compounds. Part II. Compounds of polynitro-substances with derivatives of 1-keto-1 : 2 : 3 : 4-tetrahydrocarbazole
作者:Andrew Kent、Donald McNeil
DOI:10.1039/jr9380000008
日期:——
Prasad, K. J. Rajendra; Vijayalakshmi, C. S., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1994, vol. 33, # 5, p. 481 - 482