C- and O-alkylation of ecdysteroids in lithium-ammonia solution
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Reactions of ecdysteroids with alkyl halides in lithium-ammonia solution stereospecifically led to the formation of 7α-alkylated 14-deoxy-Δ8(14)-ecdysteroids. In the presence in the initial compound of free secondary hydroxy groups in the positions 2, 3, or 22 in some cases a side process of О-alkylation as well occurred.
KeywordsMeOH Methyl Iodide Ecdysone HSQC Spectrum Hydroxyecdysone
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