Pyrrolocarbazole derivatives

C - Chemistry – Metallurgy – 07 – D

Patent

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C07D 487/04 (2006.01) A61K 31/395 (2006.01) A61K 31/695 (2006.01) C07D 487/14 (2006.01) C07F 7/10 (2006.01)

Patent

CA 2189760

Pyrrolocarbazole derivatives represented by general formula (I) or pharmacologically acceptable salts thereof, wherein R1 represents lower alkyl or aralkyl; R2 represents hydrogen, optionally substituted lower alkyl, lower alkenyl or optionally substituted aralkyl; R3, R4, R5, R6 and R7 are the same or different and each represents hydrogen, halogeno, nitro, optionally substituted lower alkanoyl, NR9R10 or OR11; and R8 represents hydrogen or forms together with R3 -CONR12-, provided that R2, R3, R4, R5, R6, R7 and R8 do not represent hydrogen at the same time when R1 is benzyl. The compounds have the effect of promoting the production of thrombocytes and thus are useful in the treatment of thrombocytopenia.

Dérivés de pyrrolocarbazole représentés par la formule générale (I), ou leurs sels acceptables sur le plan pharmaceutique, formule dans laquelle R?1¿ représente alkyle inférieur ou aralkyle; R?2¿ représente hydrogène, alkyle inférieur éventuellement substitué, alcényle inférieur ou aralkyle éventuellement substitué; R?3¿, R?4¿, R?5¿, R?6¿ et R?7¿, qui sont identiques ou différents, représentent chacun hydrogène, halogéno, nitro, alcanoyle inférieur éventuellement substitué, NR?9¿R?10¿ ou OR?11¿; et R?8¿ représente hydrogène ou forme, avec R?3¿, un groupe -CONR?12¿-, sachant que R?2¿, R?3¿, R?4¿, R?5¿, R?6¿, R?7¿ et R?8¿ ne représentent pas en même temps hydrogène quand R?1¿ représente benzyle. Ces composés ont pour effet de favoriser la production des thrombocytes et conviennent ainsi au traitement de la thrombocytopénie.

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