67879-62-3Relevant academic research and scientific papers
Synthesis of carbonates directly from 1 atm CO2 and alcohols using CH2Cl2
Yamazaki, Yusuke,Kakuma, Kasumi,Du, Ya,Saito, Susumu
experimental part, p. 9675 - 9680 (2011/02/24)
We introduced here a new one-pot, general procedure for the preparation of dialkyl carbonates from alcohols in a straightforward fashion under 1 atm pressure of CO2 using Cs2CO3 and CH 2Cl2 as key reagents.
Synthesis of symmetrical organic carbonates via significantly enhanced alkylation of metal carbonates with alkyl halides/sulfonates in ionic liquid
Jorapur, Yogesh R.,Chi, Dae Yoon
, p. 10774 - 10777 (2007/10/03)
We report a new phosgene-free method for the synthesis of symmetrical organic carbonates via alkylation of metal carbonate with various alkyl halides and sulfonates in 1-n-butyl-3-methyl-imidazolium hexafluorophosphate, [bmim] [PF6], as an ecofriendly reaction media. Alkylation of metal carbonate in various ionic liquids with 1-bromo-3-phenylpropane (1a) as a model reactant has thoroughly been investigated. Potassium and cesium carbonates appeared to be the most suitable metal carbonate due to their high solubility in ionic liquids. Besides good to excellent yields, this simple and convenient methodology is devoid of highly toxic and harmful chemicals such as phosgene and carbon monoxide, which is an additional advantage.
Method for producing symmetrical and asymmetrical carbonates
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Page column 5, (2010/02/06)
Process for the preparation of symmetrical and asymmetrical carbonates of the general formula I by reaction of alcohols of the general formula II and alkyl or aryl halides of the general formula III,R—OH??IIR′—HAL??IIIwith carbon dioxide and caesium carbonate at room temperature in dipolar aprotic solvents.
A safe synthesis of symmetrical carbonates from alkyl halides and tetraethylammonium carbonate
Mucciante, Vittoria,Rossi, Leucio,Feroci, Marta,Sotgiu, Giovanni
, p. 1205 - 1210 (2007/10/03)
A safe and mild procedure for the synthesis of organic carbonates from alkyl halides and tetraethylammonium carbonate (TEAC) is described. This method avoids the use of classical toxic and harmful chemicals like phosgene and carbon monoxide and works unde
Fragrance precursors
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, (2008/06/13)
The invention relates to fragrance precursors, In particular, the invention relates to the use of several classes of compounds which may act as fragrance precursors, e,g., in cosmetic products such as deodorants and antiperspirants and in laundry products such as detergents and fabric softners. These compounds are odorless, but upon contacting the skin as example, in skin care compositions or in personal care compositions, produce fragrances. The compounds also produce fragrances when used in the presence of lipases, e.g. as used in (laundry) detergents, thus providing a prolongation of the fabric scenting effect. The compounds under consideration are compounds of the formula I: The substituents are defined in the specification.
Continuous manufacturing method for aromatic carbonates
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, (2008/06/13)
To provide a method whereby aromatic carbonates can be manufactured continuously and efficiently by reacting dialkyl carbonate and an aromatic hydroxy compound. When reacting dialkyl carbonate and an aromatic hydroxy compound in the presence of a catalyst in a reactor, recovering dialkyl carbonate and aromatic hydroxy compound removed from the reactor, and returning it to the reaction system, at least one of the following refinement and recycling processes is conducted: [I] alcohols and alkyl aromatic ethers (anisoles) are separated and removed from the reaction mixture removed from the top of the reactor, and the dialkyl carbonate thus obtained is returned to the reaction system and [II] alkyl aromatic ethers are separated and removed from the reaction mixture removed from the bottom of the reactor and dialkyl carbonate and/or aromatic hydroxy compound are returned to the reaction system.
