7 results about "Methoxystemofoline" patented technology

This invention discloses a Schiff base photo-switching material, its preparation method, photochromic material, and its application in three-dimensional imaging. The Schiff base photo-switching material is a compound having the chemical structure shown in general formula (1) or general formula (2): Formula (1) In formula (1), X is a methoxy group; R1 is selected from aromatic hydrocarbon groups or alkyl groups; Formula (2) In formula (2), R2 is a 4-methoxystyryl group; R1 is selected from aromatic hydrocarbon groups. The Schiff base photo-switching material according to this invention can be applied to three-dimensional imaging and has high brightness and high contrast.

The invention relates to a synthetic method of resveratrol. The method comprises the following steps: dissolving a p-methoxystyrene derivative and a 3, 5-dimethoxybenzene derivative in a solvent, adding a catalyst, and carrying out a coupling reaction to obtain methylated resveratrol; after methylated resveratrol is dissolved, under the action of a deprotection reagent, a protecting group R is removed, and resveratrol is obtained after purification. According to the method, generation of waste solids is avoided, the synthesis process is more environmentally friendly, the reaction yield is high, and the product purity is high.

The invention belongs to the technical field of organic synthesis, and particularly provides a preparation method of a Ramage linker intermediate. The preparation method of the Ramage linker intermediate according to the embodiment of the invention comprises the following steps: step S1, enabling 2-vinyl benzoic acid to react with 3-methoxystyrene under the action of a ruthenium catalyst to generate the Ramage linker intermediate 2-(3-methoxyphenyl) vinyl benzoic acid; according to the preparation method of the Ramage linker intermediate disclosed by the embodiment of the invention, the preparation of the intermediate can be realized in one step through the olefin metathesis reaction, the reaction is mild, the post-treatment is simple, the synthesis route is simplified, tedious conversion and violent reaction conditions are avoided, and the reaction safety coefficient is improved.

The invention provides a novel thick oil demulsifier, and relates to the technical field of oilfield development. Comprising the following components in parts by weight: 30-50 parts of a block polymer emulsion with paraffin-proof and temperature-sensitive functions, 10-20 parts of a nonionic surfactant, 5-15 parts of functional nanoparticles, 5-15 parts of a first cross-linking agent and 20-30 parts of a solvent, wherein the block polymer emulsion with the paraffin control and temperature sensitive functions is prepared from the following raw materials: p-methoxystyrene, octadecyl acrylate, 2-acrylamide-2-methylpropanesulfonic acid, N, N-dimethylamino propyl acrylamide and N-vinyl caprolactam. Efficient demulsification and paraffin control are realized through the synergistic effect of the block polymer emulsion with paraffin control and temperature-sensitive functions, the nonionic surfactant, the functional nanoparticles, the cross-linking agent and the solvent.

The invention belongs to the technical field of medicine analysis, and particularly relates to a method for analyzing a phosphodiesterase 4 inhibitor and impurities thereof. According to the analysis method for the phosphodiesterase 4 inhibitor and the impurities thereof, the dipotassium phosphate aqueous solution is used as a mobile phase A, acetonitrile is used as a mobile phase B, and gradient elution parameters and chromatographic parameters such as the flowing speed of the mobile phase, the column temperature, the sample size and the detection wavelength are improved, so that the purity of the phosphodiesterase 4 inhibitor is improved. The method can be used for simultaneously detecting and analyzing (E)-1-(3-(tetrahydrothiophene-3-yl) oxy-4-methoxystyryl)-2, 6-dimethyl pyridine-4-(1H)-ketone and seven impurities thereof, and solves the problem that in the prior art, the (E)-1-(3-(tetrahydrothiophene-3-yl) oxy-4-methoxystyryl)-2, 6-dimethyl pyridine-4-(1H)-ketone and seven impurities thereof are lacked. The invention aims to solve the technical problems in the prior art in a conventional method for detecting and analyzing 2, 6-dimethyl pyridine-4-(1H)-ketone and impurities thereof.

This invention discloses the application of volatile substances produced by a strain of *Streptomyces northernsis* NK27 in the control of plant diseases, belonging to the field of plant disease control technology. The preservation number of *Streptomyces northernsis* NK27 is CGMCC No. 28268. The volatile substances include β-pinene, 4-methoxystyrene, cyclopentanol, and p-phenylenediamine. This invention found that 4-methoxystyrene, cyclopentanol, β-pinene, and p-phenylenediamine in the volatile substances of *Streptomyces northernsis* NK27 have significant inhibitory effects on *Botrytis cinerea*. Biocontrol experiments showed that the volatile substances produced by *Streptomyces northernsis* NK27 inoculated with wheat grain culture medium can effectively control gray mold. This invention provides a safe and effective formulation for the control of gray mold in fruit and vegetable cultivation and post-harvest storage.

This invention relates to aqueous dispersions of polymer particles obtained by emulsion polymerization of a monomer mixture comprising: -a) 50% to 90% by weight of C4-C8 alkyl acrylates, -b) 2% to 15% by weight of vinyl aromatic monomers selected from styrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, α-methylstyrene, o-ethylstyrene, m-ethylstyrene, p-ethylstyrene, p-tert-butylstyrene, o-methyl-p-isopropylstyrene, p-chlorostyrene, p-bromostyrene, o-,p-dichlorostyrene, o-,p-dibromostyrene, o-methoxystyrene, m-methoxystyrene, p-methoxystyrene, optionally substituted ethylene. The aqueous dispersion comprises: naphthalene, 2-vinylanthracene, and mixtures thereof; -c) 2% to 20% by weight of (meth)acrylate C1-C2 alkyl esters; -d) 1% to 15% by weight of (meth)acrylate hydroxy C2-C8 alkyl esters; -e) 1% to 5% by weight of olefinically unsaturated polycarboxylic acids and / or their salts; and -f) optionally up to 30% by weight of olefinically unsaturated monomers different from those defined above (a), (b), (c), (d), and (e), wherein the aqueous dispersion further comprises a surfactant mixture comprising sulfosuccinate monoester salts, sulfosuccinate diester salts, and ethoxylated and / or propoxylated nonionic surfactants, the weight percentages being relative to the total weight of the monomer mixture. The invention also relates to processes for preparing aqueous dispersions according to the invention, adhesive compositions comprising said aqueous dispersions and their uses, and articles or multilayer systems comprising said adhesive compositions. The invention further relates to self-adhesive products obtainable from multilayer systems according to the invention. Finally, the invention relates to processes for recycling articles comprising adhesive compositions according to the invention.