Intramolecular cyclization ofortho-(cyclohex-2-enyl)anilines. Modified synthesis of ellipticine
摘要:
It was found that the reactions of arylamines with 3-bromocyclohexene afforded hydrocarbazole compounds in 64-78% yields. A modified procedure for the synthesis of antitumor alkaloid ellipticine was proposed.
Intramolecular cyclization of ortho-(cyclohex-2-enyl) anilines synthesis of ellipticine
作者:A. G. Mustafin、I. N. Khalilov、E. V. Tal'vinskii、I. B. Abdrakhmanov、L. V. Spirikhin、G. A. Tolstikov
DOI:10.1007/bf00630657
日期:1992.9
method is proposed for the synthesis of the alkaloid ellipticine, which possesses a pronounced antitumoral activity. The interaction of 3-bromocyclohexene (1 equiv.) and 2,5-xylylidine (4 equiv., 150°C, 5 h) gave a mixture of hexa- and tetrahydrocarbazoles which was dehydrogenated in the presence of Pd/C to the key synthon 1,4-dimethylcarbazole. The formylation of the carbazole by the Vilsmeier-Haack reaction