Ozonolysis of Alkenes and Study of Reactions of Polyfunctional Compounds. Part 66. Ozonolysis and Hydrogenation of Diacetonides of 24,25- and 25,26-Anhydro-20-hydroxyecdysones. Synthesis of Ponasterone A.
Abstract
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ChemInform Abstract
The behavior of the title diacetonides (II) and (III) in ozonolysis and hydrogenation reactions is studied and a facile synthesis of ponasterone A (XI) is developed.