ChemInform Abstract: Regioselective Synthesis of 20‐Hydroxyecdysone Glycosides.

Abstract

Regioselective Synthesis of 20-Hydroxyecdysone Glycosides. -The biologically interesting 2-, 3-, 22-and 25-β-D-glucopyranosides of 20-hydroxyecdysone (I) are regioselectively synthesized. A combination of protection of the 1,2-diol group as phenylboronate and of the hydroxy groups as acetates is used. -(PIS, J.; HYKL, J.; BUDESINSKY, M.; HARMATHA, J.; Tetrahedron 50 (1994) 32, 9679-9690; Inst. Org. Chem. Biochem., Acad. Sci. Czech Rep., 166 10 Prague, Czech Rep.; EN)