Chemistry and Structure of Diterpene Compounds of the Kaurane Series: IV.1 Acylation of Reduction Products of the Isosteviol Keto Group |
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Authors: | Al'fonsov V A Bakaleinik G A Gubaidullin A T Kataev V E Kovylyaeva G I Konovalov A I Litvinov I A Strobykina I Yu Andreeva O V Korochkina M G |
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Institution: | (1) Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, Kazan, Tatarstan, Russia |
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Abstract: | Acetylation with acetic anhydride of (4 ,8 ,13 )-16-hydroxy-13-methyl-17-norkaurane-18-carboxylic acid and its methyl ester, obtained by reduction of isosteviol and (4 ,8 ,13 )-18-methoxycarbonyl-13-methyl-16-oxo-17-norkaurane, respectively, gives rise to (4 ,8 ,13 )-16-acetoxy-13-methyl-17-norkaurane-18-carboxylic acid and (4 ,8 ,13 )-16-acetoxy-18-methoxycarbonyl-13-methyl-17-norkaurane. The molecular and crystal structures of the compounds were established by X-ray diffraction. |
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