- Synthetic method of terminal carboxylic acid
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The invention discloses a synthetic method of a terminal carboxylic acid. The synthetic method is characterized by comprising the steps of adding an olefin represented by a formula (3) shown in the description, formic acid, acetic anhydride, Pd(OAc)2 and a monophosphorus ligand TFPP into an organic solvent in a proportion, carrying out hydrogen carbonylation reaction on the olefin represented by the formula (3) shown in the description, formic acid and acetic anhydride at 80-90 DEG C for 48h-72h under the catalysis of the metal palladium salt Pd(OAc)2 and the monophosphorus ligand TFPP so as to obtain the terminal carboxylic acid represented by a formula shown in the description, and separating a target product, namely the terminal carboxylic acid after the reaction is finished, wherein olefin represented by the formula (3) is selected from cycloolefins, or linear olefins of which the R1 is electron donating groups. By virtue of the method disclosed by the invention, corresponding terminal carboxylic acid and a derivative thereof can be prepared through the reaction under mild conditions of low temperature and no high pressure; and the steps of the synthetic method are simple and convenient, the operation is convenient, the yield is high, the energy source can be greatly saved, and the synthetic efficiency can be greatly improved.
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Paragraph 0179-0182
(2019/11/21)
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- Pd-Catalyzed Highly Chemo- And Regioselective Hydrocarboxylation of Terminal Alkyl Olefins with Formic Acid
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An efficient Pd-catalyzed hydrocarboxylation of alkenes with HCOOH is described. A wide variety of linear carboxylic acids bearing various functional groups can be obtained with excellent chemo- and regioselectivities under mild reaction conditions. The reaction process is operationally simple and requires no handling of toxic CO.
- Ren, Wenlong,Chu, Jianxiao,Sun, Fei,Shi, Yian
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supporting information
p. 5967 - 5970
(2019/08/26)
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- Synthesis of 1-substituted 4-[4-(1H-indol-3-yl)butyl]piperazines
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A convenient synthetic route for preparation of various 4-[4-(1H-indol-3-yl)butyl]piperazines bearing heterocyclic and aliphatic substituents in position 1 has been developed. During this work some synthetic possibilities of common precursor, 4-[4-(1H-indol-3-yl)butyl]piperazine, were studied and evaluated. ARKAT-USA, Inc.
- Labanauskas, Linas,Mazeikaite, Rita,Urbelis, Gintaras,Gedrimaite, Olga,Sudzius, Jurgis,Cikotiene, Inga
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p. 363 - 376
(2014/01/23)
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- Deciphering DNA-based asymmetric catalysis through intramolecular Friedel-Crafts alkylations
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We describe asymmetric intramolecular Friedel-Crafts alkylations with a DNA-based hybrid catalyst and propose a plausible binding model. This study shows promise for studying relationships between the helical chirality of DNA and enantioselectivity of the chemical reaction.
- Park, Soyoung,Ikehata, Keiichi,Watabe, Ryo,Hidaka, Yuta,Rajendran, Arivazhagan,Sugiyama, Hiroshi
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p. 10398 - 10400,3
(2020/09/09)
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- Preparation of 2S,3S-N-isobutyl-N-(2-hydroxy-3-amino-4-phenylbutyl) -p-nitrobenzenesulfonylamide hydrochloride and other derivatives of 2-hydroxy-1,3-diamines
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The present invention provides a new process for the preparation of 2S, 3S-N-isobutyl-N-(2-hydroxy-3-amino-4-phenylbutyl)-p-nitrobenzenesulfonylamide hydrochloride, wherein this compound is prepared directly from the chloromethylalcohol. Importantly, the
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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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- 1,2,3-Thiadiazole-3-in-5-ylidene-urea derivatives, process for making the same and compositions containing the same having growth regulating activity for plants
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1,2,3-Thiadiazole-3-in-5-ylidene-urea derivative of the formula STR1 in which R1 is hydrogen or alkyl which may be substituted in one or several places by oxygen or sulfur and wherein R2 and R3 have the meaning as given in the attached specification and wherein X is oxygen or sulfur. The compounds have properties suited for controlling the natural growth and natural development of plants and in addition have a superior defoliating property without accompanying unpleasant odors.
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- 1,2,3-Thiadiazole-2-id derivatives, process for making the same and composition containing the same having a growth regulating activity for plants
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1,2,3-Thiadiazole-2-id-derivative of the formula STR1 in which R1 is hydrogen or alkyl which may be substituted in one or several places by oxygen or sulfur and wherein R1 has the meaning as given in the attached specification and wherein X is oxygen or sulfur and B is a univalent metal atom. The compounds have properties suited for controlling the natural growth and natural development of plants and in addition have a superior defoliating property.
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