- PHOTOCYCLISIERUNG EINES GIBBERELLINALDEHYDS ZU EPIMEREN CYCLOBUTANOLEN UND DEREN BASISCHE RUECKSPALTUNG, PARTIALSYNTHESE VON 16,17-DIHYDRO-Δ15-GIBBERELLIN-A3
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UV-irradiation of the aldehyde 1 leads to the 7-epimeric cyclobutanols 2a and 2b which undergo upon treatment with NaOCH3 retroaldol-like cleavage to 1 and 3.Oxidation and deacetylation of 3 affords the 16,17-dihydro-Δ15-gibberellin-A3 (5).
- Lischewski, M.,Adam, G.
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- Patch preparations for treating plants
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The following invention introduces a patch preparation for treating plants, whereas the patch preparations comprise a chemical layer composed of at least one agrochemically active compound, at least one adhesive and optionally, one or more additives. The components are dispersed in a matrix state on a substrate which are then introduced on the roots of the plant to be treated.
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- Method of manufacturing a dry water-soluble herbicidal salt composition
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A method of manufacturing a solid, water-soluble herbicidal composition comprising a water-soluble salt of a herbicidal compound is disclosed. The herbicidal compound is a water-insoluble compound that includes a carboxylic acid functionality, such as a phenoxy-substituted carboxylic acid compound or a substituted benzoic acid compound, and is sufficiently pure to form a dry, solid herbicidal salt composition after interaction with a suitable neutralizing base, such as ammonia, an alkylamine, a dialkylamine, a trialkylamine, a hydroxyalkylamine, a dihydroxyalkylamine, an alkaline salt of an alkali metal or a combination thereof. The dry herbicidal salt composition includes at least about 90% by weight of the water-soluble herbicidal salt, and dissolves rapidly and essentially completely in water to form an aqueous herbicidal solution including up to about 75% by weight of the water-soluble herbicidal salt.
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- THE INHIBITION OF GIBBERELLIN PLANT HORMONE BIOSYNTHESIS BY ENT-6-OXO-5&β(H)-7-NORGIBBERELL-16-ENES
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Ent-19-hydroxy-6-oxo-5β(H)-7-norgibberell-16-ene and the corresponding 19-carboxylic acid are shown to be inhibitors of gibberellin biosynthesis in the fungus, Gibberella fujikuroi, at stages involved in the oxidative modification of ring B of the kaurenoid precursors.Key Word Index - Gibberella fujikuroi; Hypocreales; biosynthesis; gibberellic acid; plant growth regulator.
- Hanson, James R.,Parry, Keith P.,Willis, Christine L.
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p. 1955 - 1958
(2007/10/02)
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- STEREOSELECTIVE REDUCTION OF 3-KETO GIBBERELLIN ACIDS TO 3β-OLS USING K-SELECTRIDE WITH KH2PO4 BUFFER
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KH2PO4 buffered K-Selectride gives with 3-keto gibberellin acids, borates which are reduced stereoselectively to 3β-ols.
- Bell, Russell A.,Turner, John V.
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p. 4871 - 4872
(2007/10/02)
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- GIBBERELLINE-LXII SYNTHESE VON 7-DESOXYGENIERTEN GIBBERELLIN-A3-VERBINDUNGEN
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Reaction sequences leading to GA3 derivatives with stepwise deoxygenated position 7 have been reported.From four different methods studied for the synthesis of GA3-7-alcohols the direct NaBH4-reduction of the anhydrides 5a and 5b has been found to be optimal leading in good yields to 3 and 9, respectively.Oxidation of 3 with the N-chlorosuccinimide-dimethylsulfide complex or pyridinium chlorochromate followed by deacetylation afforded the GA3-7-aldehyde (16).-The partial synthesis of 6β-methyl-7-nor-GA3 (20) has been realized starting from 3 via the iodinemethyl compound 18 and its reduction with (C2H5)3SnH or Na2 to 19 and subsequent saponification.-The structures of the new gibberellin derivatives were determined on the basis of IR, (1)H-NMR and MS data.
- Lischewski, M.,Adam, G.
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p. 1237 - 1244
(2007/10/02)
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- THE MICROBIOLOGICAL TRANSFORMATION OF SOME ENT-KAUR-16-ENE 7-, 15- AND 18-ALCOHOLS BY GIBBERELLA FUJIKUROI
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The effect of the 7-, 15- and 18-hydroxyl groups on the microbiological transformation of some diterpenoids by Gibberella fijikuroi has been studied.An 18-substituent appears to exert an inhibitory effect on transformation involving reaction at the 6β-position. - Key Word Index: Gibberella fujikuroi; candol A; candol B; sideridiol; 7,18-dihydroxykaurenolide.
- Fraga, Braulio M.,Hanson, James R.,Hernandez, Melchior G.,Sarah, Fahmi Y.
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p. 1087 - 1092
(2007/10/02)
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