Cephalotaxanes: their method of preparation and their use in treatment of cancers, leukemias, parasites, including those resistant to usual chemotherapeutic agents, and as reversal agents
US6579869B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2000 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Nov 14, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention concerns a compound of formula (I) wherein:W represents O or NH,Q represents an unbranched or branched, saturated or unsaturated or aromatic, cyclic or acyclic or heterocyclic hydrocarbon radical containing 1 to 30 carbon atoms including or not heteroatom(s),R1 is H, OH, or OMe, O-(C1-C30)-alkyl, O-aryl-(C1-C30)-alkyl, O-(C2-C30)-alkenyl, O-(C3-C30)-cycloalkyl or null, andR2 is H or OH, or R1 and R2 form together —O—,R3=R4=OMe or R3 and R4 form together —OCH2O—,R is H, C1-C30 alkyl or O-protecting group and R6 represents an unbranched or branched, saturated or unsaturated or aromatic, cyclic or acyclic or heterocyclic hydrocarbon radical containing 1 to 30 carbon atoms including or not heteroatom(s), or R and R6 form together —CMe2—,n is 0 to 8,R5 is H, OH, OMe, O-(C1-C30)-alkyl, O-aryl-(C1-C30)-alkyl, O-(C2-C30)-alkenyl, O-(C3-C30)-cycloalkyl or O-aryl,the dotted line is null or forms a double bond depending on the meaning of R1.It also concerns their methods of preparation and their use in treatment of cancers, leukemias, parasites and as reversal agents of harringtonines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.