- METHOD FOR PRODUCING CARBAMATE
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PROBLEM TO BE SOLVED: To provide a method for producing carbamate in which a high yield can be obtained and the amount of by-products produced can be reduced. SOLUTION: In the method, carbamate is synthesized using at least one member selected from the group consisting of amine and derivative thereof, alcohol having 3 or more carbon atoms and carbon dioxide as a raw material, cerium oxide as a catalyst, and 2-cyanopyridine as a dehydrating agent. By using an alcohol having 3 or more carbon atoms, a high yield can be obtained and the amount of by-products produced can be reduced. In addition, the pressure of carbon dioxide can be lowered and the production can be of ease. SELECTED DRAWING: Figure 1 COPYRIGHT: (C)2018,JPO&INPIT
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Paragraph 0041; 0043
(2018/10/16)
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- Direct Catalytic Synthesis of N-Arylcarbamates from CO2, Anilines and Alcohols
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The direct catalytic synthesis of carbamates from CO2, amines and methanol was achieved by controlling both the reaction equilibrium and the reactivity of the three components. The combination of CeO2 and 2-cyanopyridine was an effective catalyst, providing various carbamates including N-arylcarbamates in high selectivities.
- Tamura, Masazumi,Miura, Ayaka,Honda, Masayoshi,Gu, Yu,Nakagawa, Yoshinao,Tomishige, Keiichi
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p. 4835 - 4839
(2018/10/15)
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- METHOD OF PRODUCING A SODIUM SALT OF (2,6-DICHLOROPHENYL)AMIDE CARBOPENTOXYSULFANILIC ACID
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The invention relates to the field of organic chemistry and medicine, and more particularly to a method of producing synthetic biologically active derivatives of carbopentoxysulfanilic acid. The present method of producing a sodium salt of (2,6-dichloroph
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Paragraph 0021
(2018/09/21)
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- (4-Arylsulfamoyl)phenylcarbamic acid esters: I. Synthesis and activity against herpes viruses
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Aiming to modify the biological activity of sulfonamides, a number of alkyl (4-arylsulfamoyl)- phenylcarbamates were prepared in 50–70% yield. Biological screening showed that the target compounds possessed a high activity against herpes viruses as well as a traditional antibiotic one.
- Krutikov,Erkin,Tets,Shmarov
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p. 1567 - 1573
(2016/08/26)
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- Drug with Activity against the Herpes Virus Family
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The invention relates to medicine, and specifically to synthetic biologically active derivatives of carbopentoxysulfanilic acid. The novel substance comprises a (2,6-dichlorophenyl)amide salt of carbopentoxysulfanilic acid of general formula: where X is N
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Paragraph 0016; 0017
(2013/11/06)
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- Preparation of ionic liquid-based vilsmier reagent from novel multi-purpose dimethyl formamide-like ionic liquid and its application
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In continuation of research to explore the applied potential of DMF-like ionic liquid, the ionic liquid version of N,N-dimethyliminiumchloride (Vilsmier reagent) has been synthesized from DMF-like ionic liquid and tested effectively for its capacity to achieve more useful organic transformations. The results show that DMF-like ionic liquid is world's first task specific ionic liquid which has catalyzed numerous diverse type of reaction and is multipurpose in its application. Thus a new term for this DMF-like ionic liquid has been coined that is DMF-like "multipurpose" ionic liquid. Copyright
- Hullio, Ahmed Ali,Mastoi
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scheme or table
p. 1647 - 1657
(2012/09/21)
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- Selenium-catalyzed oxidative carbonylation of aniline and alcohols to n-phenylcarbamates
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A facile one-pot, phosgene-free synthesis of N-phenylcarbamates is demonstrated. Catalyzed by selenium, oxidative carbonylation of aniline with alcohols in the presence of carbon monoxide and oxygen affords the corresponding N-phenylcarbamates, mostly in fair to good yields. Selenium can be easily recovered because of its phase-transfer catalysis function. Copyright
- Zhang, Xiaopeng,Jing, Huanzhi,Zhang, Guisheng
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experimental part
p. 1614 - 1624
(2010/07/09)
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- Effect of successive increase in alcohol chains on reaction with isocyanates and isothiocyanates
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The reaction of isocyanates and isothiocyanates with long-chain alcohols, e.g. n-hexanol, n-heptanol and n-octanol, exclusively gave N-aryl-O-alkyl carbamates, while N-aryl-O-alkyl carbamates were formed along with symmetrical 1,3-disubstituted ureas and thioureas when the same reactions were carried out with small-chain alcohols at room temperature without using any solvent.
- Perveen, Shahnaz,Yasmin, Arfa,Khan, Khalid Mohammed
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experimental part
p. 18 - 23
(2010/04/23)
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- A practical organotin(IV) catalyst for urethan and polyurethan technology
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Diallyltin(IV)di(2-ethyl hexanoate) 1, an air and moisture stable compound efficiently catalyses the addition of aryl isocyanates to various alcohols giving rise to substituted urethans in good to excellent yields.
- Roy,Majumdar
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p. 333 - 340
(2007/10/02)
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- KINETICS AND MECHANISM OF THE ADDITION OF α-HYDROXY AND α-AMINO PHOPSPHONATES TO PHENYL ISOCYANATE
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Kinetics and mechanism of the addition of a series phosphorylated alcohols and amines with variable alkoxy substituents at the phosphorus atom to phenyl isocyanate have been studied by the spectrophotometric method.The adducts were isolated and characterized.The reactivity of the phosphonates is determined by steric and stereoelectronic effects of the substituents.The mechanism of the reaction and the nature of the dominating effect of a substituent can change, depending on the reaction conditions and the type of reaction series; the factors responsible for such changes have been clarified.
- Sayakhov, R. D.,Mironov, A. V.,Galkin, V. I.,Kutyrev, G. A.,Cherkasov, R. A.
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p. 1719 - 1725
(2007/10/02)
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- Reactions of Aryl Isocyanates with Alcohols
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The reaction of aryl isocyanates with alcohols has been kinetically studied as a model reaction for polyurethane formation under conditions similar to those of industrial scale production.Considering the isocyanate and alcohol structure, kinetic isotopic effect, activation enthalpy and entropy and solvent effects it has been found that the most probable mechanism is the alcohol addition through a four-membered cyclic transition state.
- Bacaloglu, R.,Cotarca, L.,Marcu, N.,Toelgyi, St.
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p. 428 - 434
(2007/10/02)
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