Harmine derivatives, intermediates used in their preparations, preparation processes and use therefo
申请人:Wu Jialin
公开号:US20090227619A1
公开(公告)日:2009-09-10
This invention relates to compounds of general formula (I), wherein R
1
, R
2
, R
3
, R
4
and R
5
are as defined in the specification; intermediates used in their preparation, preparation processes and use thereof. The present invention produces new harmine derivatives with enhanced antitumour activity and lower nervous system toxicity by structurally modification of the parent structure of β-carboline of harmines at position 1, 2, 3, 7 and 9. The compounds of the present invention can be prepared easily with high yield. They can be used in manufacture of a variety of antitumour medicines and medicines used in treatment of tumour diseases in combination of light or radiation therapy.
A series of novel 9-substituted beta-carboline derivatives was synthesized from harmine and l-tryptophan, respectively. Cytotoxic activities of these compounds in vitro were investigated. The results showed that most compounds of 9-substituted beta-carboline derivatives had more remarkable cytotoxic activities in vitro than their corresponding parent compounds. Acute toxicities and antitumor effects