3 results about "Glutamic acid diethyl ester" patented technology

The invention belongs to the technical field of preparation of nail polish compositions, particularly relates to a bio-based perfume nail polish composition and a preparation method thereof, and provides the following scheme aiming at the problems of high emission of volatile organic compounds (VOC), serious environmental pollution, potential health risks and the like due to the fact that existing nail polish usually uses a petroleum-based solvent and synthetic resin. The invention relates to a sugarcane-fermented ethanol beverage which comprises the following raw materials in parts by weight: 30-60 parts of sugarcane-fermented ethanol, according to the invention, sugarcane fermented ethanol, acetyl tributyl citrate, diethyl lauroyl glutamate, zein, konjac glucomannan, abietic acid methacrylate, neroli oil, cananga odorata oil, sodium alginate, chitosan, mineral mica, alkannin, panthenol, organic bentonite, carnauba wax nanoparticles and a photoinitiator are used; the pollution to the environment and the dependence on non-renewable resources are effectively reduced, and the potential harm to human health is reduced.

This invention discloses a method for synthesizing p-methylaminobenzoylglutamate diethyl ester. Using p-methylaminobenzoic acid and diethyl glutamate hydrochloride as raw materials, and carbonyl diimidazole as an ester activator, the specific synthesis method involves dissolving carbonyl diimidazole in a solvent under inert gas protection, stirring, adding p-methylaminobenzoic acid to generate the active ester, then adding diethyl glutamate hydrochloride and reacting. The mixture is then concentrated, cooled, water is added dropwise, filtered, and dried to obtain p-methylaminobenzoylglutamate diethyl ester. This method is simple, convenient, low-cost, and has a high yield, showing great promise for industrialization.

The invention discloses a method for detecting isomer impurities in L-glutamic acid diethyl ester hydrochloride by HPLC (High Performance Liquid Chromatography), and belongs to the technical field of chemical engineering and pharmacy. D-isomer impurities in L-glutamic acid diethyl ester hydrochloride are detected by adopting high performance liquid chromatography, a CHIRALPAK AY-H column is adopted as a chromatographic column, an ethanol solution of 0.05% diethylamine is adopted as a mobile phase, isocratic elution is carried out, and the content of the D-isomer impurities in L-glutamic acid diethyl ester hydrochloride is detected. According to the present invention, the chromatographic conditions are as follows: the chromatographic conditions are as follows: the chromatographic conditions are as follows: the chromatographic conditions are as follows: the chromatographic conditions are as follows: the chromatographic conditions are as follows: the column temperature is 35 DEG C and the detection wavelength is 220 nm, the L-glutamic acid diethyl ester hydrochloride and the D-isomer thereof can be effectively separated and the content thereof can be quantitatively detected, the method has characteristics of simple operation, strong specificity, high sensitivity, high accuracy and good linearity, and the quality of the p-fluorothiophenol product can be effectively controlled.