32results about How to "Simple post-processing purification" patented technology

The invention discloses a preparation method of 4-bromocarbazole, which belongs to the technical field of chemistry. A kind of preparation method of 4-bromocarbazole, under the action of catalyst, ligand and alkali, o-bromoaniline and m-dibromobenzene undergo C-N coupling and C-C coupling series reaction, one-pot method and one-step synthesis 4-bromocarbazole, wherein, the m-dibromobenzene is both a reactant and simultaneously dibromobenzene is also used as a reaction solvent, and the remaining m-dibromobenzene can be reclaimed after the reaction finishes. The preparation method of the present invention uses cheap and easy-to-obtain o-bromoaniline and m-dibromobenzene as raw materials, and obtains the product 4-bromocarbazole in one step through a one-pot series reaction. Compared with the prior art, it avoids the reduction of the nitro group into a ring steps, that is, the reaction steps are shortened, which has the advantages of low production cost and environmental friendliness.

The invention discloses a method for preparing cyclocarbonate, which belongs to the technical field of organic compound preparation. The method of the invention can realize the synthesis of cyclocarbonate compounds from carbon dioxide and epoxy compounds under mild conditions. The method has mild reaction conditions, can be realized at normal temperature and pressure, has high catalyst efficiency and wide substrate universality. The technical scheme of the present invention is as follows: in the presence of a quaternary ammonium salt, carbon dioxide and an epoxy compound are used to synthesize a cyclocarbonate compound through the action of a diglycolamine-bridged bisaryloxy rare earth-zinc heterobimetallic complex catalyst.

The invention relates to a fluorescence sensing material based on phenylthiazole and p-cyanodiphenol, as well as a preparation method and application of the fluorescence sensing material, and belongs to the technical field of a chemical fluorescence sensing material. The preparation method comprises the following steps: taking 2,6-dihydroxymethyl p-methylphenol and thiosemicarbazide as basic raw materials, performing reaction on the premise of taking acetophenone and thiourea as basic raw materials and taking an iodine elementary substance as a catalyst to prepare 2-amino-4-phenylthiazole; preparing 3-formyl-4-hydroxybenzyl cyanide by taking p-cyano-phenol as a basic raw material and under the existence of hexamethylenetetramine; performing nucleophilic reaction to combine the 2-amino-4-phenylthiazole and the 3-formyl-4-hydroxybenzyl cyanide to obtain the fluorescence sensing material. Due to the own conjugation structure, the fluorescence sensing material prepared by the method emits orange red fluorescence, has sensitive selective identification performance on heavy metal Fe<3+> and shows fluorescence quenching, the response time is short, the change of a fluorescence signal is visible to naked eyes under an ultraviolet lamp, and the interference of other common metal ions is small.

The invention discloses a preparation method and application of a naphthylamine compound and its salt, a method for synthesizing a naphthylamine compound with 4-formylphenol as a substrate, and simultaneously provides its hydrochloride and phosphate salts. The preparation method has the characteristics of short synthesis route, cheap and easy-to-obtain raw materials, simple post-treatment and purification, and high overall yield. It is of great significance to expand the types of naphthylamine derivatives and to study them in biology and medicine. At the same time, this application has further studied the anti-tumor effect and mechanism of the obtained naphthylamine compounds and their hydrochloride and phosphate salts. The results show that the naphthylamine compounds and their hydrochloride and phosphate salts have: (1) inhibition Proliferation, growth or migration of cancer cells; (2) Promote apoptosis of cancer cells or reduce migration or invasion of cancer cells, and also act as an inhibitor of STAT3 tyrosine phosphorylation.

The invention provides a preparation method of (S)-glycidyl phthalimide (II). Utilize phthalimide (Ⅲ) and (S)-1-substituent propylene oxide (IV) as raw materials, react under the action of catalyst to generate 2-((S)-3-substituent-2-hydroxyl Propyl) isoindoline-1,3-diketone (Ⅴ), and finally generate (S)-glycidyl phthalimide (Ⅱ) through ring-closing reaction. The method of the invention has cheap and easy-to-obtain raw materials, easy realization of reaction conditions and low cost; short reaction route, simple operation and simple post-treatment; less side reactions, high yield and purity of the target product, and is suitable for industrial production.

The invention discloses a method for preparing an indolone derivative. The method disclosed by the invention comprises the step of subjecting phenylpropiolic acid and aniline, which serve as startingraw materials, to four steps, i.e., condensation, nucleophilic substitution, palladium catalyzing coupling and hydrolyzing sequentially, thereby obtaining the indolone derivative. According to the method disclosed by the invention, the raw materials are readily available, the operation is simple and convenient, the production efficiency is high, enlarged production is facilitated, and the productis high in total yield and easy to purify.

The invention discloses a preparation method of 1,2-cyclohexanedione, which belongs to the technical field of chemistry. The preparation method is: under the protection of nitrogen, stir cyclohexanone, catalyst and ligand evenly, add hydrogen peroxide dropwise at room temperature, and the dropwise addition time is 1-2h. ~6h, after the reaction is finished, wash and separate the liquids, and rectify the organic layer under reduced pressure to obtain 1,2-cyclohexanedione, wherein the catalyst is a copper salt catalyst, and the ligand is a β-diketoimine ligand body. Compared with the reported methods, this method uses cheap and easily available hydrogen peroxide as an oxidant, the by-product is water, the reaction system is green and clean, cyclohexanone is used as both a reactant and a solvent during the reaction, the reaction conditions are mild, and the operation is convenient. The method has high yield, green and clean process, and provides a new method for the synthesis of 1,2-cyclohexanedione.

The invention discloses a preparation method of indolo[2,3-A]carbazole, which belongs to the technical field of chemistry. The preparation method is as follows: under the action of catalyst, ligand and base, o-dibromobenzene and o-phenylenediamine undergo C-N coupling and C-C coupling series reaction to obtain indolo[2,3-A ] carbazole; Catalyst is palladium salt catalyst and copper salt catalyst, and wherein, palladium salt catalyst comprises palladium chloride, palladium acetate, four (triphenylphosphine) palladium, palladium trifluoroacetate, palladium acetylacetonate or three (dibenzylidene Acetone) dipalladium, copper salt catalyst includes cuprous iodide, cuprous chloride, cuprous bromide, cuprous oxide, copper sulfate, cupric chloride, copper acetate or copper trifluoroacetate; ligand is phosphine ligand ; The base is an organic base or an inorganic base. The invention uses cheap and easy-to-obtain o-phenylenediamine and o-dibromobenzene as raw materials, and compared with the prior art, the reaction steps are short, the raw materials are easy to obtain, the production cost is low, the environment is friendly, and the like.

The invention discloses a synthesis process of homodimer of FKBP ligand and belongs to an improved synthesis process of AP1903, wherein the homodimer of FKBP ligand refers to AP1903. According to theoptimized route of the synthesis process chooses, (S)-piperidine-2-methyl formate is connected to the compound Cpd9' as selected, an acid Cpd6' obtained after ester hydrolysis is easier to be purified by post-treatment purification, and precipitation or extraction treatment can be chosen by the post-treatment purification. Although the total reaction steps of the synthetic route in the prior literature are the same as the optimized route of the invention, the synthetic route in the prior literature belongs to the vertical route, and the post-treatment of the fifth, sixth and eighth steps requires column chromatography, thereby leading to a higher research and development cost. The optimized AP1903 synthetic route belongs to the parallel route, and the post-treatment is simpler and more advantageous for separation and purification, so that the cost of research and development is relatively low and the economic benefit is obviously superior to that of the synthetic route in the prior art.