Synthesis of 6″-triazole-substituted α-GalCer analogues as potent iNKT cell stimulating ligands
摘要:
We report the synthesis of a small series of 6 ''-triazol-1-yl-substituted alpha-GalCer analogues by late-stage conversion of the 6 ''-OH to an azide group, copper-catalyzed azide-alkyne cycloaddition and final deprotection. When evaluated for their capacity to induce IL-2 secretion in vitro, all compounds proved equally potent or superior to alpha-GalCer. The S. A. R suggests that the improved antigenic activity is mainly triggered by the triazole functionalization in se. While the introduction of selected substitutuents at C-4 of this heterocyclic ring is tolerated, this generally fails to further improve antigenicity. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis of 6″-triazole-substituted α-GalCer analogues as potent iNKT cell stimulating ligands
摘要:
We report the synthesis of a small series of 6 ''-triazol-1-yl-substituted alpha-GalCer analogues by late-stage conversion of the 6 ''-OH to an azide group, copper-catalyzed azide-alkyne cycloaddition and final deprotection. When evaluated for their capacity to induce IL-2 secretion in vitro, all compounds proved equally potent or superior to alpha-GalCer. The S. A. R suggests that the improved antigenic activity is mainly triggered by the triazole functionalization in se. While the introduction of selected substitutuents at C-4 of this heterocyclic ring is tolerated, this generally fails to further improve antigenicity. (C) 2012 Elsevier Ltd. All rights reserved.