Convenient Synthesis of Fragment E of Antibiotic, Nosiheptide
摘要:
A convenient synthesis of Fragment E, 4-hydroxymethyl-3-methylindole-2-carboxylic acid (1), from 2-methyl-3-nitrobenzyl alcohol through six steps conversion in 32% overall yield is described.
Compounds are described with the general formula
in which the groups are as defined in the description and characterized by the presence of substituents in position 9. Said compounds are endowed with potent topoisomerase I inhibiting activity and therefore are useful as medicines for the treatment of tumours and viral and parasite infections.
[EN] 9-SUBSTITUTED CAMPTOTHECIN DERIVATIVES AS ANTITUMOR COMPOUNDS<br/>[FR] DÉRIVÉS DE CAMPTOTHÉCINE SUBSTITUÉS EN POSITION 9 COMME COMPOSÉS ANTITUMORAUX
申请人:SIGMA TAU IND FARMACEUTI
公开号:WO2009098116A1
公开(公告)日:2009-08-13
Compounds are described with the general formula (I) in which the groups are as defined in the description and characterized by the presence of substituents in position 9. Said compounds are endowed with potent topoisomerase I inhibiting activity and therefore are useful as medicines for the treatment of tumours and viral and parasite infections.
Convenient Synthesis of Fragment E of Antibiotic, Nosiheptide
A convenient synthesis of Fragment E, 4-hydroxymethyl-3-methylindole-2-carboxylic acid (1), from 2-methyl-3-nitrobenzyl alcohol through six steps conversion in 32% overall yield is described.
Synthesis and cytotoxic activity of new 9-substituted camptothecins
A series of novel 9-substituted camptothecins derived from 9-formylcamptothecin were synthesized. The aldehyde was obtained from 10-hydroxycamptothecin or, better, by total synthesis. The compounds showed antiproliferative activity higher than that of the reference compound topotecan. Modelling suggested the possibility of a favourable interaction of small and polar 9-substituents with the topoisomerase