Hexamethyldisilazane-Promoted Sonogashira Reaction of Polyfunctionalized N-Containing Heterocycles
摘要:
1,1,1,3,3,3-Hexamethyldisilazane (HMDS) was found to be an efficient solvent for Sonogashira reaction. For the synthesis of C-nucleosides, Sonogashira reaction of ethynyldeoxyriboside with halogenated pyrimidine or pyridine derivatives could be improved by the use of an HMDS-DMF mixed solvent. In situ protection of hydroxy and amino groups by the solvent system may play an important role for the improvement.