Ozonolysis of Alkenes and Study of Reactions of Polyfunctional Compounds: LXVII. Synthesis of 27,27,27-Trifluoro-20-hydroxyecdysone Acetonides from 24,25- and 25,26-Anhydro-20-hydroxyecdysone Derivatives via Ozonolysis and Trifluoromethylation

Author： Odinokov V.   Savchenko R.   Afon’kina S.   Khalilov L.  

Publisher： MAIK Nauka/Interperiodica

ISSN： 1070-4280

Source： Russian Journal of Organic Chemistry, Vol.41, Iss.3, 2005-03, pp. : 376-385

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Abstract

Ozonolysis of 24,25/25,26-anhydro derivatives of 20-hydroxy-2,3:20,22-di-O-isopropylidene-ecdysone and 2,3-di-O-acetyl-20-hydroxy-20,22-O-isopropylideneecdysone, followed by trifluoromethylation of the corresponding 25-oxo derivatives afforded 2,3:20,22-di-O-isopropylidene- and 20,22-O-isopropylidene-27,27, 27-trifluoro-20-hydroxyecdysones.

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