5128-06-3Relevant academic research and scientific papers
Vinylphosphonium Salts and Allenes from Carbonyl Compounds Using Titanium-Substituted Ylides
Reynolds, Kelly A.,Dopico, Pablo G.,Brody, Marcus S.,Finn
, p. 2564 - 2573 (1997)
(E)-Vinylphosphonium salts are conveniently obtained from the reaction of carbonyl compounds with titanium-substituted ylide species (Me2N)3P=CHTi(OiPr)Cl2 or (Me2N)3P=CHTi(OiPr)2Cl. While a wide variety of nonenolizable aldehydes are tolerated, the steric bulk surrounding the ylide carbon limits the process to highly activated or unhindered ketones. The vinylphosphonium salts may be converted to allenes by deprotonation and condensation with a second aldehyde, thus accomplishing a two-step double olefination allene synthesis. This methodology, along with a previously reported one-pot reaction, comprises the most convenient route available for the synthesis of 1,3-disubstituted allenes. The metal-substituted ylide reagent may be generated in situ from commercially-available starting materials. Two representative vinylphosphonium salts were shown to undergo reversible isomerization to the (Z)-form upon irradiation.
Production of cyclic carbonate
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Paragraph 0129, (2017/11/08)
The purpose of the present invention is to provide a practical method for producing a cyclic carbonate, which is widely used for various applications such as electrolytic solutions for lithium-ion secondary batteries and plastic materials, by a reaction between an epoxide (oxirane) and carbon dioxide, the method giving consideration to the reduction of environmental loads and making it possible to produce said cyclic carbonate with high yield under mild conditions, such as at room temperature and atmospheric pressure. The present invention relates to a method for producing a cyclic carbonate, the method being characterized by reacting an epoxide and carbon dioxide in the presence of an iodine-anion-containing phosphonium salt and a compound including a hydrogen atom that can form a hydrogen bond with an oxygen atom in the epoxide.
Effective synthesis of cyclic carbonates from carbon dioxide and epoxides by phosphonium iodides as catalysts in alcoholic solvents
Aoyagi, Naoto,Furusho, Yoshio,Endo, Takeshi
supporting information, p. 7031 - 7034 (2013/12/04)
Phosphonium iodides effectively catalyzed the reaction of CO2 and epoxides under mild conditions such as ordinary pressure and ambient temperature in 2-propanol, and the corresponding five-membered cyclic carbonates were obtained in high yields.
