Hexa-cyclic camptothecin derivatives

Organic compounds -- part of the class 532-570 series – Organic compounds – Unsubstituted hydrocarbyl chain between the ring and the -c-...

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540581, 544361, 544362, 544125, 546 41, 546 48, 546 51, C07D49122

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049392557

ABSTRACT:
A novel hexa-cyclic compound, a derivative of camptothecin, of the general formula: ##STR1## The compound is prepared from an aminoketone compound and a pyranoindolizine compound through Friedlaender reaction. It has an excellent antitumor activity and a high degree of safety, and can be applied as an antitumor medicine for curing tumors of various kinds.

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C. F. Schwender et al., J. Med. Chem., 16, 254-257, (1973).
A. Ricci et al., J. Heterocyclic Chem., 11, 515-518, (1974).

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