Transannular participation of some C-19 esters in reactions at C-20 of gibberellin A13
Methanolysis or sodium borohydride reduction of the 3-acetoxy-7,19-dimethyl ester of gibberellin A13 20-toluene-p-sulphonyl anhydride afforded, respectively, the unusual 19-orthoester or epimeric 19-acetals as the major products rather than the products of simple displacement of the 20-toluene-p-sulphonoxy-group. The structure of the 19-orthoester was proven by X-ray analysis.
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Main Authors: | Fraga, Braulio M., González, Antonio G., Hernández, Melchor G., García-Tellado, Fernando, Hanson, James R., Hitchcock, Peter B. |
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Format: | artículo biblioteca |
Language: | English |
Published: |
Royal Society of Chemistry (UK)
1981
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Online Access: | http://hdl.handle.net/10261/14360 |
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