- Synthesis method of crude carboxylic ester (by machine translation)
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The method is characterized in that the carboxylic ester and the ether are prepared by reacting a carboxylic ester with an ether at a certain temperature under the catalysis of a catalyst at a certain pressure for a certain time. (by machine translation)
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Paragraph 0021; 0022
(2020/08/09)
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- Green preparing orthoformate cleaning process
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The invention provides a green process for preparing orthoformate. A hydrogen chloride alcohol solution is prepared from a byproduct hydrogen chloride tail gas of the chlorine-related synthesis industry and then is slowly added into a reaction system, so that loss caused by escape of hydrocyanic acid is reduced, the yield is increased, great equipment corrosion caused by the byproduct hydrochloric acid prepared by the companies is avoided, the economic additional value of the byproduct hydrogen chloride is greatly increased, three wastes are avoided, the byproduct only comprises ammonium chloride, resources are reasonably utilized, and the green process for preparing the orthoformate is an environment-friendly production process and has a good social benefit.
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Paragraph 0054; 0056; 0057
(2016/10/07)
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- Eco-friendly synthesis of 3-etherified estrones
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The conventional etherification uses toxic or hardly degradable alkylating agents. An eco-friendly tandem etherification/aromatization is presented to prepare estrone 3-secondary ethers from easily available dienone 1. Three marketed 3-etherified estrogen drugs were synthesized with the method from commercial available starting material.
- Zheng, Dong-Qing,Jing, Yu,Zheng, Bing-Ying,Ye, Yun-Fei,Xu, Sheng,Tian, Wei-Sheng,Ma, Hai-Yan,Ding, Kai
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p. 2164 - 2169
(2016/04/09)
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- Alcoholysis of fluoroform
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Fluoroform (CHF3) reacts with alkali metal alkoxides MOR (M = Na, K) in the corresponding alcohols ROH (R = Me, Et, i-Pr, t-Bu, and Allyl) at 80-120°C to give orthoformate esters HC(OR)3 in 55-90% yield. Particularly notable is the f
- Miloserdov, Fedor M.,Grushin, Vladimir V.
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p. 105 - 109
(2015/03/03)
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- Photocatalytic reaction of arylamines/alcohols on TiO2 nano-particles
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In this article, the photocatalytic reaction of aniline and 4-amino N,N-dimethyl aniline with methanol, ethanol and isopropanol on anatase TiO 2 nano-particles under UV (365-nm wavelength) irradiation was examined. The concentration of unreacted arylamines and products was measured by gas chromatography picks integration, and then the products were identified by mass spectroscopy analysis. By making a comparison within the rates of photocatalysis of each arylamine in different alcohols under various irradiation times, it was revealed that, in all cases, the sequence of photocatalysis rate was methanol > ethanol > isopropanol. In reactions where the concentrations of arylamine were lower than 10 mmol/l, imines were the main products and the alkylation of amines was not observed. In the higher concentration of arylamines, oxidation and dimerization was occurred. Springer Science+Business Media B.V. 2010.
- Hosseinnia, Azarmidokht,Pazouki, Mohammad,Karimian, Ketauon
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experimental part
p. 373 - 381
(2011/10/19)
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- On the Mechanism of Acetalization Reactions with Carboxamide-Dialkyl Sulfate Adducts; a New Method of Preparation of Orthocarboxylic Esters and of Cleavage of Carboxamides.
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It is shown that the efficiency of carboxamide-dialkyl-sulfate adducts in acetalization reactions depends on their alkylation ability.A mechanism of acetal formation using orthoformates as acetalization reagents is proposed.Alcoholysis of carboxamide-dialkyl sulfate adducts 1b, 11, 13 affords orthocarboxylic esters.Carboxamides and carboxmorpholides react with dimethyl sulfate/methanol to give methyl esters.
- Kantlehner, Willi,Gutbrod, Heinz-Dieter
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p. 1677 - 1688
(2007/10/02)
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