A process for accumulation of thermal energy utilizing said composition is also disclosed.Hiroshi ItataniMikito KashimaMasami AikawaUSUS4717494 * 1986年6月25日 1988年1月5日 Ube Industries, Ltd. Chemical reaction of a dicarboxylic acid anhydride and an alcohol...
Esterification - Esters are formed by the reaction between an alcohol and either an organic or an inorganic acid. The esterification reaction is undertaken in a reaction column that contains a solid resin catalyst. Click here for reaction, mechanism, typ
The reaction of pyroglutamic acid (2) with an amino alcohol led to conversion of the carboxyl unit to an oxazoline, and this was reduced to an oxazolidine derivative, 198. N-Alkylation followed by hydrolysis led to 199, where the oxazolidine functioned as an aldehyde surrogate (a Meyers' ...
The treatment of organic layer with acetic anhydride afforded the N-acetylated ketone in 89% yield. The protocol could be extended for the preparation of modified dipeptides and a tripeptide as well. The peptide analogs could be obtained in high yields and without the need for any chromatograp...
The use of bromide or chloride additives in styrene phenylation by benzoic acid anhydride results in an increase in catalytic activity and the yield of arylation products. The best results are obtained when LiCl is used. In this case, the yield of stilbene increases from 14 to 85%. Kinetics...
This modification preserved its biodegradability and regulated its acidity during hydrolysis. This process involved a method where maleic anhydride was covalently grafted onto the side chain of polylactic acid through a free radical reaction, at a temperature of 100 °C for 20 h, using benzoyl ...
Reacting a cyclic anhydride with an alcohol in presence of an asymmetric catalyst containing Lewis acid and an optically active ligand selected from a diol, aminoalcohol or bisoxazoline compounddoi:US6624324 B2an alkyl group optionally substituted with an alkoxy group, a phenoxy group, a dialkyl...
The more active benzoic anhydride is formed by dehydration using acetic anhydride or phosphorus pentoxide. Highly reactive acid derivatives such as acid halides are easily obtained by mixing with halogenation agents like phosphorus chlorides or thionyl chloride. ...
The available methods for obtaining the sulfated lignin derivatives are based on the use of aggressive and environmentally hazardous sulfating reagents, e.g., sulfuric anhydride and its complexes with toxic amines [13,14]. The method for the enzymatic sulfation of organosolv and technical lignins wa...
Anhydrous formic acid can be obtained by direct fractional distillation under reduced pressure, the receiver being cooled in ice-water. The use of P2O5 or CaCl2 as dehydrating agents is unsatisfactory. Reagent grade 88% formic acid can be satisfactorily dried by refluxing with phthalic anhydride for...