924-88-9Relevant articles and documents
Reduction of Activated Alkenes by PIII/PV Redox Cycling Catalysis
Longwitz, Lars,Werner, Thomas
supporting information, p. 2760 - 2763 (2020/02/05)
The carbon–carbon double bond of unsaturated carbonyl compounds was readily reduced by using a phosphetane oxide catalyst in the presence of a simple organosilane as the terminal reductant and water as the hydrogen source. Quantitative hydrogenation was observed when 1.0 mol % of a methyl-substituted phosphetane oxide was employed as the catalyst. The procedure is highly selective towards activated double bonds, tolerating a variety of functional groups that are usually prone to reduction. In total, 25 alkenes and two alkynes were hydrogenated to the corresponding alkanes in excellent yields of up to 99 %. Notably, less active poly(methylhydrosiloxane) could also be utilized as the terminal reductant. Mechanistic investigations revealed the phosphane as the catalyst resting state and a protonation/deprotonation sequence as the crucial step in the catalytic cycle.
Diisopropyl succinate synthesis method
-
Paragraph 0032-0088, (2019/10/04)
The invention discloses a diisopropyl succinate synthesis method. According to the synthesis method, succinic anhydride and isopropanol serve as raw materials, a tubular reactor is used for segmented catalysis by taking acid resin and nano-solid super-acid as catalysts to continuously produce diisopropyl succinate, segmented catalysis is performed by the aid of different acidity and catalytic activity of the acid resin catalysts and the nano-solid super-acid, so that reaction yield and product purity are high, and products are easily purified. The preparation method is green, environmentally friendly, simple in preparation, low in cost, high in yield and purity and suitable for large-scale industrial production.
Transformation of amides into esters by the use of chlorotrimethylsilane
Xue, Cuihua,Luo, Fen-Tair
, p. 359 - 362 (2015/02/02)
A mild transformation of various amides and imides into the corresponding esters and diesters in good yields by using chlorotrimethylsilane and alcohols at rt are described. Either primary, secondary, or tertiary amide or imide can be used in this transformation. Primary and secondary alcohols gave better yields than tertiary alcohols.
Efficient microwave-assisted esterification reaction employing methanesulfonic acid supported on alumina as catalyst
Fabian, Lucas,Gomez, Matias,Kuran, Juan A. Caturelli,Moltrasio, Graciela,Moglioni, Albertina
, p. 2386 - 2392 (2014/07/22)
A rapid and efficient protocol assisted by microwave irradiation for the synthesis of esters using methanesulfonic acid (CH3SO3H) supported on Al2O3 (AMA) as catalyst and free of solvent is described. The products were obtained in good yields and purity, with reduced reaction time, and the process is simple and environmentally benign. Copyright
HYDROGENATION AND ESTERIFICATION TO FORM DIESTERS
-
Page/Page column 20, (2011/02/24)
A process is disclosed which employs hydrogenation and esterification to form alkyl diesters. The process subjects an unrefined or otherwise not purified composition comprising maleic anhydride production residue to the processes of hydrogenation and esterification and forming diesters at high conversion efficiency.
Transformation of amides into esters by the use of chlorotrimethylsilane
Xue, Cuihua,Luo, Fen-Tair
, p. 359 - 362 (2007/10/03)
A mild transformation of various amides and imides into the corresponding esters and diesters in good yields by using chlorotrimethylsilane and alcohols at rt are described. Either primary, secondary, or tertiary amide or imide can be used in this transformation. Primary and secondary alcohols gave better yields than tertiary alcohols.
Na2CO3/SOCl2: A mild and convenient reagent for the preparation of isopropyl carboxylates
Kazemi, Foad,Kiasat, Ali Reza,Mombaini, Began
, p. 1187 - 1191 (2007/10/03)
Na2CO3/SOCl2 has been used for esterification of aliphatic and aromatic acids with isopropanol. This esterification method is compatible with a wide assortment of functional groups.
Direct oxidative cleavage of α- and β-dicarbonyls and α-hydroxyketones to diesters with KHSO5
Yan, Jun,Travis, Benjamin R.,Borhan, Babak
, p. 9299 - 9302 (2007/10/03)
Presented is a methodology to oxidatively cleave α-hydroxyketones and α- or β-diones using the environmentally benign reagent KHSO 5, prepared easily from Oxone, to diesters in one simple transformation. In addition, we undertook a mechanistic study to provide a plausible mechanistic interpretation. These reactions may prove to be valuable alternatives to other related metal-mediated processes.
Esterification in dry media using ferric perchlorate adsorbed on silica gel
Parmar, Anupama,Kaur, Jatinder,Goyal, Rita,Kumar, Baldev,Kumar, Harish
, p. 2821 - 2826 (2007/10/03)
Adsorption of Fe(ClO4)3(H2O)6 onto chromatographic grade silica gel in the presence of alcohol ( to be used for esterification ) produces a supported reagent, Fe(ClO4)3(ROH)6/SiO2. This reagent, has been found effective for the rapid and high yield of esters, on grinding in the presence of carboxylic acids using pestle and mortar in the solid state.
A Mild, Simple, and Convenient Synthesis of Diesters from Malonyl or Succinyl Dichloride and Alcohols Catalyzed by Potassium Tetracarbonylhydridoferrate, KHFe(CO)4, as a New Catalyst
Shim, Sang Chul,Huh, Keun Tae,Park, Woo Hyun
, p. 59 (2007/10/02)
A large variety of alcohols react with acyl halides of dicarboxylic acids such as malonyl dichloride and succinyl dichloride in the presence of a catalytic amount of tetracarbonylhydridoferrate at room temperature under carbon monoxide or nitrogen to give the corresponding diesters in good yields.
