학술논문
9α-hydroxylation of 25-fluoroponasterone a diacetonide in lithium-ammonia solution.
Document Type
Article
Source
Subject
*DIACETONE glucose
*HYDROXYLATION
*LITHIUM
*AMMONIA
*ALKALI metals
*
*
*
*
Language
ISSN
1070-4280
Abstract
25-Fluoroponasterone A diacetonide reacted with lithium in liquid ammonia to give 25-fluoro-9α,20-dihydroxyecdysone diacetonide whose hydrolysis afforded 25-fluoro-9α,20-dihydroxyecdysone 20,22-acetonide. Nonfluorinated analog of the latter was isolated previously from Silene italica ssp. nemoralis. [ABSTRACT FROM AUTHOR]