36results about How to "The difficulty of the reaction process is low" patented technology

Arylamine compound is prepared with aromatic nitro compound and through reaction in organic solvent at normal pressure in the presence of CO and water by using Se as catalyst and alkali as cocatalyst. The said aromatic nitro compound may have substituent radical in the phenyl radical and the substituent radical may be one or several electron donating and / or accepting group. The reaction conditions include the molar ratio between aromatic nitro compound and water of 1 to 1-1000; molar amount of Se is 0.1-100% of the aromatic nitro compound; molar amount of alkali is 0-400 % of the aromatic nitro compound; the weight ratio between aromatic nitro compound and solvent of 1 to 2-1000; reaction time of 1-36 hr; and reaction temperature of 20-120 deg.c.

The invention relates to a diselenide compound synthesis method and the adopted technical proposal comprises the following steps: adopting halogenated hydrocarbon and selenium as raw materials and organic base or inorganic base as cocatalyst or no cocatalyst, continuously injecting carbon dioxide gas in organic solvent to react in the present of water under the temperature of 20-100 DEG C at normal pressure for 1-24h, cooling to the room temperature, switching carbon dioxide to air or oxygen to precipitate unreacted selenium, filtrating to collect filtrate, then adding 2-3 times of water, precipitating products and finally obtaining the diselenide compound by filtration. The method invention is normal press reaction with low cost, environmentally friend, low reaction process difficulty, convenient operation and easy following separation of products and catalyst.

The invention relates to a method for synthesizing 1-aminoanthraquinone. The technical scheme is as follows: in the presence of carbon monoxide and water, 1-nitroanthraquinone used as a raw material reacts by using selenium as a catalyst and inorganic alkali or organic alkali as a cocatalyst at high temperature under high pressure to synthesize the 1-aminoanthraquinone by one step. The invention is simple and safe to operate, and has the advantages of water-phase reaction, accessible raw material, no pollution, high selectivity and high yield; and after the reaction finishes, the catalyst can be recycled and utilized repeatedly.

The invention relates to a method for synthesizing symmetric urea compounds from nitrocompounds. The technical scheme is as follows: in the presence of carbon monoxide and water, by using nitrocompounds as the raw material, selenium as a catalyst and an organic alkali or inorganic alkali as a cocatalyst (or no cocatalyst is added), reaction is performed under the conditions of atmospheric pressure and no solvent to synthesize the symmetric urea compounds by one step, wherein the mol ratio of water to nitrocompounds is 1:1-1:2.5; the selenium accounts for 0.05-1 mol% of the nitrocompounds; the mol ratio of organic alkali or inorganic alkali to nitrocompounds is 1:10-1:4; the reaction time is 1-8 hours; and the reaction temperature is 35-95 DEG C. The invention is simple and safe to operate, and can synthesize the symmetric urea compounds from the nitrocompounds under the conditions of atmospheric pressure and no solvent by one step, and has the advantages of one-pot reaction, accessible raw material, no pollution, high selectivity and high yield; and after the reaction finishes, the catalyst can be separated and recycled.

The present invention relates to a method used for synthesizing derivatives of 1-alkyl-2-alkoxy-3-indole aldehyde oxime. Indole-one is used as basic material and treated through Vilsmeier-Hacck formylation reaction and alkylation reaction to prepare 1-alkyl-2-chlorine-3-indole aldehyde; under the conditions with potassium hydroxide and fatty alcohol and at the temperature of 50 to 80 DEG C, the reaction is monitored by a thin chromatogram TLC; after the reaction is completed, no treatment is required and hydroxylamine hydrochloride is directly added into the mixture for oximation reaction; the reaction temperature is maintained; the reaction lasts for 1 to 2 hours; the ratio of the 1-alkyl-2-chlorine-3-indole aldehyde, the hydroxylamine hydrochloride, the potassium hydroxide, the fatty alcohol and water is equal to 1mmol to 2mmol to 2mmol to from 5ml to 8 ml to 1ml; finally water is added for sedimentation, and the novel compounds of the category of the 1-alkyl-2-chlorine-3-indole aldehyde can be separated through filtration and chromatography. The method has the advantages of mild reaction conditions, process under atmospheric pressure, simple operation, less investment in the equipment, low production costs, less pollution and high yield.