Novel synthetic ganglioside derivatives and compositions thereof

Abstract

Novel synthetic gangliosides and pharmaceutical compositions containing such synthetic gangliosides are described. Methods of making the novel synthetic ganglioside compounds and compositions as well as their use in the field of neuroprotection and cancer treatment is also described.

1 - 22 . (canceled) 
     
     
         23 . A synthetic compound having a formula selected from the group consisting of (Va), (Vb), (Vc) and (Vd): 
       
         
           
           
               
               
           
         
       
       wherein
 the saccharide portion is selected from the group consisting of a monosaccharide, a disaccharide, an oligosaccharide, a polysaccharide, an N-acetylated derivative thereof and an N-deacetylated derivative thereof; 
 X is NR 1 R 2 ; 
 Y is —OH; 
 Z is O; 
 each R 1  and R 2  are independently selected from the group consisting of —C(=M)R 3 , and —C(=M)-p-R 3 ; 
 wherein M and p are independently selected from O, NR 4  and S; 
 R 3  is H, alkyl, arylalkyl, haloalkyl, aryl, heteroaryl, or heteroalkyl; 
 R 4  is H, alkyl, aryl, arylalkyl, heteroaryl, heteroalkyl, or haloalkyl; 
 R 6  is H; 
 R 6′  is —NR 9 R 10 ; 
 R 6″  is H; 
 R 7  and R 8  are independently H, and aryl, where, R 7  and R 8  are optionally substituted with at least one group selected from the group consisting of halo, haloalkyl, alkoxy, and thiohaloalkyl; 
 R 7′  and R 8′  are independently H, alkenyl, —C(═O)NR 9 R 10 , aryl, heteroaryl, or a linked bicyclic mixture of aryl and heteroaryl, where R 7′  and R 8′  are optionally substituted with at least one group selected from the group consisting of halo, haloalkyl, alkoxy, and thiohaloalkyl; 
 R 9 , R 10 , and R 11  are independently alkyl, cycloalkyl, aryl, arylalkyl, heteroaryl, or heteroalkyl, where R 9 , R 10 , and R 11  are optionally substituted, preferably-substituted with at least one group selected from the group consisting of halo, haloalkyl, alkoxy, and thiohaloalkyl; or where R 9  and R 10  taken together with the nitrogen to which they are attached form a heterocyclic ring comprising at least one heteroatom selected from N, O and S; 
 and all pharmaceutically acceptable salts, hydrates, geometric isomers and solvates thereof.