The solubilization of silicates was investigated using kaolin and quartz sand as model substances. The mineral solubilization was studied in the concentration of solubilized Si and Al. The chemical leaching of the silicates was carried out using inorganic and organic acids as well as sodium hydroxid
The chemical and microbiological synthesis of beyergibberellin A9
✍ Scribed by Braulio M. Fraga; Antonio G. González; Melchor G. Hernández; Aurelio San Martín; Zvitendo J. Duri; James R. Hanson
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- French
- Weight
- 190 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0040-4039
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Conversion of cx-santonin into 8,12-eudesmanolides was accomplished by chemical, enzymatic and microbiological means. Catalytic hydrogenation of ~-santonin gave a mixture of hexahydro derivatives, which were sequentially isolated by lipase-catalysed selective acylation. Reduction of the 6ct-lactone
Chemical, Enzymatic and Microbiological Synthesis of 8,12-Eudesmanolides: Synthesis of Sivasinolide and Yomogin Analogues. -The conversion of α-santonin (I) into the analogue (II) of natural 8,12-eudesmanolides such as sivasinolide or yomogin is reported. The route involves chemical, enzymatic, an