- Clay anti-swelling agent for acidifying acid in high-temperature oil field
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The invention relates to the technical field of oilfield development, in particular to a clay anti-swelling agent for high temperature oilfield acidification. The clay anti-swelling agent is preparedby: reacting 1-naphthol with acrylic acid to generate na
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Paragraph 0026-0028; 0030-0031; 0034-0038; 0040-0041; 0044
(2020/12/31)
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- METHOD FOR PRODUCING (METH) ACRYLATE
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PROBLEM TO BE SOLVED: To provide a production method for obtaining (meth) acrylate in high yields, by preventing a large amount of waste from produced from by-products, like the conventional art. SOLUTION: A method for producing (meth) acrylate includes the reaction between a compound represented by the following formula (I) and an aryl alcohol. Preferably, the reaction occurs in the presence of a catalyst of at least one metal compound selected from first Group metal compounds and second Group metal compounds. SELECTED DRAWING: None COPYRIGHT: (C)2019,JPOandINPIT
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Paragraph 0019; 0020; 0024
(2018/12/05)
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- CARBOXYLIC ACID ESTER PRODUCTION METHOD
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Provided is a production method whereby corresponding carboxylic acid esters can be obtained from a variety of carboxylic acids at a high yield, even under conditions using a simple reaction operation and little catalyst and even if the amount of substrate used is theoretical. A production method for carboxylic acid ester, whereby a prescribed diester dicarbonate, carboxylic acid, and alcohol are reacted in the presence of at least one type of magnesium compound and at least one type of alkali metal compound.
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Paragraph 0075; 0076
(2019/01/04)
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- METHOD FOR PRODUCING CARBOXYLIC ACID ANHYDRIDE AND METHOD FOR PRODUCING CARBOXYLIC ACID ESTER
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Provided is a production method whereby corresponding carboxylic acid anhydrides and carboxylic acid esters can be obtained at high yield from various carboxylic acids even without a solvent and near room temperature. A method for producing a carboxylic acid anhydride represented by formula (II), the method comprising reacting a compound represented by formula (I) and a carboxylic acid in the presence of a Group II metal compound having an ionic ligand containing an oxygen atom. A method for producing a carboxylic acid ester, the method comprising reacting a carboxylic acid anhydride produced by the aforementioned method and an alcohol. In formula (I), R1 represents a C1-20 hydrocarbon group. In formula (II), R2 represents a C1-20 hydrocarbon group.
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Paragraph 0082; 0083; 0084
(2017/04/18)
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- (Meth) acrylic acid ester naphthylacetic
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PROBLEM TO BE SOLVED: To provide a method for producing less discolored (meth)acrylic naphthyl ester at a high yield by reacting (meth)acrylic anhydride with naphthol, and to provide a method for producing (meth)acrylic naphthyl ester achieving high polymerization rate. SOLUTION: There is provided a method for producing (meth)acrylic naphthyl ester by reacting naphthol and (meth)acrylic anhydride, wherein, the production method of (meth)acrylic naphthyl ester is characterized in making a carbonate salt present in the reaction system of the naphthol and the (meth)acrylic anhydride. COPYRIGHT: (C)2010,JPOandINPIT
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Paragraph 0035; 0037; 0039; 0043
(2018/11/24)
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- 1,4-Diazabicyclo[2.2.2]octane-Promoted Aminotrifluoromethylthiolation of α,β-Unsaturated Carbonyl Compounds: N-Trifluoromethylthio-4-nitrophthalimide Acts as Both the Nitrogen and SCF3 Sources
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A novel difunctionalization reaction is described. It uses N-trifluoromethylthio-4-nitrophthalimide as the reagent, which serves as both the nitrogen and SCF3 sources. In the presence of DABCO (1,4-diazabicyclo[2.2.2]octane), the nitrogen and SCF3 groups can be incorporated into α,β-unsaturated carbonyl compounds easily and give versatile β-amino ketones and esters in good yields. This difunctionalization reaction features mild reaction conditions, high atom-economy, and efficient access to α-SCF3 amino acids.
- Xiao, Qing,He, Qijie,Li, Juncheng,Wang, Jun
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supporting information
p. 6090 - 6093
(2016/01/09)
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- A bifunctional β-isocupreidine derivative as catalyst for the enantioselective morita-baylis-hillman reaction and a mechanistic rationale for enantioselectivity
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Starting from β-isocupreidine (β-ICD), a series of difunctional catalysts were synthesized to ascertain their usefulness in the asymmetric Morita-Baylis-Hillman (MBH) reaction. The trichloroacetylcarbamate derivative was found to give the (R)-MBH adducts in excellent optical purities (90-99% ee) and moderate to good yields (43-83%), in some cases, better than β-ICD. A number of acrylates were also tested and 2,6-dimethyl-4-nitrophenyl acrylate was identified as a suitable alternative to the popular hexafluoroisopropyl acrylate, with both the β-ICD and trichloroacetylcarbamate derivatives. The mechanism of the rate- and selectivity-determining step was ascertained by means of experimental observations and a computational investigation aimed at clarifying the transition state structures is reported. These studies have clarified the reasons for the effectiveness of these structurally related catalysts in the asymmetric MBH reaction between acrylates and aldehydes. β-Isocupreidine derivatives were used tocatalyze the asymmetric Morita-Baylis-Hillman (MBH) reaction, giving the (R)-MBH adducts in excellent optical purities and moderate to good yields. Both 2,6-dimethyl-4-nitrophenyl and hexafluoroisopropyl acrylate could be used. The rate- and selectivity-determining step was identified and the structures of the preferred transition states were computed.
- Martelli, Gianluca,Orena, Mario,Rinaldi, Samuele
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experimental part
p. 4140 - 4152
(2012/09/08)
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- Enantioselective organocatalytic Michael additions to acrylic acid derivatives: Generation of all-carbon quaternary stereocentres
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Acrylic esters, thioesters and N-acryloyl pyrrole have been identified as effective electrophiles in the enantioselective Michael addition reaction with β-keto ester pro-nucleophiles catalysed by a cinchona alkaloid derived bifunctional organocatalyst; enantiomeric excesses of up to 98% and yields of up to 96% can be obtained for a range of Michael acceptors and pro-nucleophiles. The Royal Society of Chemistry.
- Rigby, Caroline L.,Dixon, Darren J.
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supporting information; experimental part
p. 3798 - 3800
(2009/02/07)
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