93-97-0Relevant articles and documents
The effect of microwave irradiation on carbodiimide-mediated esterifications on solid support
Stadler, Alexander,Kappe, C.Oliver
, p. 3915 - 3920 (2001)
The esterification of a polymer-supported alcohol (PS Wang resin) with benzoic acid was investigated using microwave irradiation. Activation of the carboxylic acid was carried out using diisopropylcarbodiimide, either via the O-acylisourea or symmetrical anhydride protocols. In the microwave-assisted solid-phase coupling using the O-acylisourea method the main product of the reaction was 1-benzoyl-1,3-diisopropylurea, formed by rearrangement of the thermolabile isourea intermediate. On the other hand, significant rate enhancements were observed for the coupling of benzoic anhydride to Wang resin using microwave flash heating in 1-methyl-2-pyrrolidone as solvent. Reaction times were reduced from 2 to 3 days using conventional conditions, to 10 min by microwave dielectric heating.
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Gerrard,Thrush
, p. 2117,2119 (1959)
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Multifunctional amphiphilic carbonaceous microcapsules catalyze water/oil biphasic reactions
Tan, Hongyi,Zhang, Peng,Wang, Lei,Yang, Dang,Zhou, Kebin
, p. 11903 - 11905 (2011)
Multifunctional amphiphilic hollow carbonaceous spheres assembled into Pickering emulsions exhibit reversible pH-dependent phase-transfer behavior and can efficiently catalyze water/oil biphasic reactions, facilitating the recycling of the catalysts and separation of the products.
Preparation method of symmetric aromatic anhydride compound
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Paragraph 0053-0054; 0061-0062, (2021/08/11)
The invention discloses a preparation method of a symmetric aromatic anhydride compound, the preparation method comprises the following steps: dissolving alpha-terpilenol and pyridine in a solvent, adding an aroyl chloride solution, and reacting for 8-16 hours to obtain the symmetric aromatic anhydride compound. The alpha-terpilenol and the aroyl chloride are used as raw materials, and the method has the advantages of being easy to operate, mild in reaction condition, high in safety, simple in technological process and post-treatment, low in cost, high in yield of part of products and the like, and is very beneficial to industrialization.
METHOD FOR PRODUCING CARBOXYLIC ACID ANHYDRIDE OR SULFONIC ACID ANHYDRIDE
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Paragraph 0050-0051, (2021/02/25)
To provide a method for producing carboxylic acid anhydride or sulfonic acid anhydride in which carboxylic acid anhydride or sulfonic acid anhydride is produced in a simple or easy process using carboxylic acid or sulfonic acid as raw material, and using an industrially available raw material and in an efficient process in industrial practice.SOLUTION: Provided is a method for producing carboxylic acid anhydride or sulfonic acid anhydride, which is a method for producing an acid anhydride by reacting carboxylic acid or sulfonic acid and a halogenating agent, and in which a solvent containing a phosphoric acid ester such as the formula (1) is used. (R1, R2 and R3 are the same or non-identical alkyl group or fluorine-containing alkyl group having 1 to 10 carbon atoms, and at least one is fluorine-containing alkyl group.).SELECTED DRAWING: None