The invention relates to new derivatives of 5-aminolevulinic acid (5-ALA) and their use as photosensitizing agents. In particular, it relates to compounds of general formula I and their pharmaceutically acceptable salts, to methods for preparing such compounds and their medical and cosmetic use, for example in methods of photodynamic therapy and diagnosis: wherein R1 represents a hydrogen atom or an optionally substituted alkyl or cycloalkyl group; R2, each of which may be the same or different, represents a hydrogen atom or an optionally substituted alkyl group; and X is a linking group.
The invention relates to new derivatives of 5-aminolevulinic acid (5-ALA) and their use as photosensitizing agents. In particular, it relates to compounds of general formula I and their pharmaceutically acceptable salts, to methods for preparing such compounds and their medical and cosmetic use, for example in methods of photodynamic therapy and diagnosis:
wherein
R
1
represents a hydrogen atom or an optionally substituted alkyl or cycloalkyl group;
R
2
, each of which may be the same or different, represents a hydrogen atom or an optionally substituted alkyl group; and
X is a linking group.
The invention relates to new derivatives of 5-aminolevulinic acid (5-ALA) and their use as photosensitizing agents. In particular, it relates to compounds of general formula I and their pharmaceutically acceptable salts, to methods for preparing such compounds and their medical and cosmetic use, for example in methods of photodynamic therapy and diagnosis:
wherein
R1 represents a hydrogen atom or an optionally substituted alkyl or cycloalkyl group;
R2, each of which may be the same or different, represents a hydrogen atom or an optionally substituted alkyl group; and
X is a linking group.
[EN] DEGRADATION AGENTS FOR CYCLIN DEPENDENT KINASE, PREPARATION METHOD THEREFOR, PHARMACEUTICAL COMPOSITION THEREOF AND USE THEREOF<br/>[FR] AGENTS DE DÉGRADATION DE KINASE DÉPENDANTE DE LA CYCLINE, LEUR PROCÉDÉ DE PRÉPARATION, COMPOSITION PHARMACEUTIQUE DE CEUX-CI ET UTILISATION ASSOCIÉE<br/>[ZH] 一类细胞周期依赖性激酶的降解剂、其制备方法、药物组合物及其用途
Ganglioside GM(2) expressed on the cell surface of human cancers is a promising target for immunotherapy because GM(2) antibodies are cytotoxic in vitro and GM(2) antibody formation can be induced upon vaccination in cancer patients. We recently reported on the efficient chemical synthesis of GM(2); clinical trials with these synthetic GM(2) conjugated to a purified carrier protein (KLH) are currently under way. In our efforts to generate a totally synthetic GM(2) cancer vaccine, we have now synthesized GM(2) neoglycolipid 1, which consists of the GM(2)-tetrasaccharide epitope that is linked through a spacer to the B-cell stimulatory glycolipid 4. Target compound 1 was constructed from the GM(2) tetrasaccharide donor 2, the 9-hydroxynonanoate 3 spacer, and the 6-amino-6-deoxy derivative (5) of compound 4. Building block 5 was obtained from Z-protected 6-azido-6-deoxy-N-leucyl-glucosamine derivative 12, which was available from glucosamine by two different approaches; the route with the Z-protected derivative of 4 (10) as intermediate gave the best yields, The neoglycolipid 1 reacted with a number of different GM(2)-reactive antibodies. Vaccination of rabbits with 1 resulted in induction of antibodies against GM(2), thus confirming the viability of this novel concept far the construction of a totally synthetic vaccine.