51146-89-5Relevant academic research and scientific papers
Isomeric product detection in the heterogeneous reaction of hydroxyl radicals with aerosol composed of branched and linear unsaturated organic molecules
Nah, Theodora,Zhang, Haofei,Worton, David R.,Ruehl, Christopher R.,Kirk, Benjamin B.,Goldstein, Allen H.,Leone, Stephen R.,Wilson, Kevin R.
, p. 11555 - 11571 (2015/02/19)
(Figure Presented) The influence of molecular structure (branched vs linear) on product formation in the heterogeneous oxidation of unsaturated organic aerosol is investigated. Particle phase product isomers formed from the reaction of squalene (C30H50, a branched alkene with six C=C double bonds) and linolenic acid (C18H30O2, a linear carboxylic acid with three C=C double bonds) with OH radicals are identified and quantified using two-dimensional gas chromatography-mass spectrometry. The reactions are measured at low and high [O2] (～1% vs 10% [O2]) to understand the roles of hydroxyalkyl and hydroxyperoxy radical intermediates in product formation. A key reaction step is OH addition to a C=C double bond to form a hydroxyalkyl radical. In addition, allylic alkyl radicals, formed from H atom abstraction reactions by hydroxyalkyl or OH radicals play important roles in the chemistry of product formation. Functionalization products dominate the squalene reaction at ～1% [O2], with the total abundance of observed functionalization products being approximately equal to the fragmentation products at 10% [O2]. The large abundance of squalene fragmentation products at 10% [O2] is attributed to the formation and dissociation of tertiary hydroxyalkoxy radical intermediates. For linolenic acid aerosol, the formation of functionalization products dominates the reaction at both ～1% and 10% [O2], suggesting that the formation and dissociation of secondary hydroxyalkoxy radicals are minor reaction channels for linear molecules. The distribution of linolenic acid functionalization products depends upon [O2], indicating that O2 controls the reaction pathways of the secondary hydroxyalkyl radical. For both reactions, alcohols are formed in favor of carbonyl functional groups, suggesting that there are some key differences between heterogeneous reactions involving allylic radical intermediates and those reactions of OH radicals with simple saturated hydrocarbons.
PLANT ROOTING INDUCER
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Page/Page column 14, (2008/06/13)
An inducing agent for plant root including a ketol unsaturated fatty acid having 5 to 24 carbon atoms, 1 to 6 double bonds between carbon atoms and an ± ketol structure or 3 ketol structure (in particular 9-hydroxy-10-oxo-12( Z ), 15( Z )-octadecadienoic acid is preferable), which inducing agent for plant root may be used to promote or induce the root growth even when transplanting by cutting plants for which root generation is hard such as pine, cedar, tea, chestnut, may be used even for root growth of cuttings of Prunus x yedoensis (cherry trees) for which root growth is considered impossible, Hypericum chinense for which is transplantation by cutting is said to be difficult, and Paraserianthes falcataria Becker useful as a material for plywood, and may be used by a simple technique such as spraying.
α-KETOL UNSATURATED FATTY ACID DERIVATIVES AND PLANT GROWTH REGULATORS CONTAINING THE SAME
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Page/Page column 17-18, (2008/06/13)
α-Ketol unsaturated fatty acid derivatives represented by the general formula (1); and plant growth regulators containing the same, which develop plant growth regulation performance such as flower bud formation acceleration in low concentrations and are excellent in stability: wherein R1 is straight-chain C1-5 alkyl or a straight-chain unsaturated C3-5 hydrocarbon group having one or two double bonds; and R2 is straight-chain C1-15 alkylene or a straight-chain unsaturated C2-15 hydrocarbon chain having one to three double bonds, with the proviso that the number of carbon-carbon double bonds is at most four.
Total Synthesis of α-Ketol Derivative of Linolenic Acid (KODA), a Flower-inducing Factor in Lemna paucicostata
Yokokawa, Yoshihiro,Kobayashi, Kouji,Yokoyama, Mineyuki,Yamamura, Shosuke
, p. 844 - 845 (2007/10/03)
Racemic 9-hydroxy-10-oxo-12(Z), 15(Z)-octadecadienoic acid [(±)-KODA] was synthesized via a coupling reaction between a diyne and an epoxide derived from methyl oleate as a key step. An optically active 9R-KODA was also synthesized by enantioselective lipase-catalyzed esterification of an allyl alcohol. Both synthetic (±)-KODA and 9K-KODA showed remarkable flower-inducing activity in Pharbitis nil.
Synthetic method of ketol unsaturated fatty acids
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, (2008/06/13)
The present invention provides an efficient synthetic method of α-ketol unsaturated fatty acid having a double bond at a β-position to the ketone group thereof. It comprises the steps of: preparing compound (4) by reacting monosubstituted acetylene (2) with epoxide (3); and preparing α-ketol unsaturated fatty acid (1) from said compound (4) as shown in Reaction Formula 1: wherein R1 represents an alkyl group of 1-18 carbon atoms or an aliphatic hydrocarbon group of 2-18 carbon atoms having 1-5 double or triple bonds at given positions; R2 represents a protecting group for a hydroxyl group; R3 represents a protecting group for a carboxyl group; R is identical to R1 or, when R1 has one or more triple bonds, represents an aliphatic hydrocarbon group in which each triple bond of R1 is converted to a double bond; and A represents an alkylene group of 1-18 carbon atoms.
