41 results about "Isopropoxybenzene" patented technology

A composition curable by a metathesis reaction and comprising an olefin-containing resin system and metathesis catalyst. The resin system comprises siloxane-based oligomers or polymers end-capped and/or tethered with olefin functional groups that are capable of undergoing a metathesis reaction. The composition also includes a ruthenium carbene complex catalyst, whereby the catalyst initiates the metathesis reaction of the composition. The oligomer or polymer may be, for example, one or a combination of a telechelic polydimethylsiloxane end-capped with norbornenylethyl groups, a polydimethylsiloxane tethered and end-capped with norbornenylethyl groups, a tri-functional polydimethylsiloxane end-capped with norbornenylethyl groups, or a quadri-functional polydimethylsiloxane end-capped with norbornenylethyl groups. The catalyst may be, for example, a ruthenium carbene complex, such as 1,3-bis-(2,4,6-trimethylphenyl)-2-(imidazolidinylidene) dichloro(o-isopropoxyphenylmethylene) ruthenium.

The invention especially discloses a solvent-free method for hydrogenation preparation of 2,4-dichloro-5-isopropoxy aniline from 2,4-dichloro-5-isopropoxy nitrobenzene, belonging to the field of catalytic hydrogenation production. The method uses 2,4-dichloro-5-isopropoxy nitrobenzene as a raw material and is characterized in that 2,4-dichloro-5-isopropoxy nitrobenzene reacts with hydrogen at a temperature of 80 to 100 DEG C and a pressure of 0.3 to 2.5 MPa in the presence of a catalyst and an auxiliary agent, no solvent is added, and water is separated after completion of the reaction so as to obtain chloroaniline. The catalyst is a noble metal catalyst prepared through independent research and development, and the usage amount of the catalyst is 0.05 to 20% of the mass of 2,4-dichloro-5-isopropoxy nitrobenzene; the auxiliary agent is a mixture of ethanolamine and pyridine, and the usage amount of the auxiliary agent is 0.01 to 10% of the mass of 2,4-dichloro-5-isopropoxy nitrobenzene; and chromatographic purity of obtained 2,4-dichloro-5-isopropoxy aniline is 99.5% or above, a dechlorination amount can be controlled within 0.1%, a conversion rate is 100%, and yield is 95% or above.

This invention provides a compound of formula (I):

The invention discloses a treatment method for recycling oxadiazon etherifying salt waste. The treatment method is characterized by comprising the following treatment steps: adding water to dissolve salt waste; extracting with methylbenzene; preparing bromine employing an acid process; and concentrating and extracting KCl, so as to obtain industrial bromine and crude KCl products, wherein a methylbenzene extracting liquid containing 2,4-dichloro-5-nitro-isopropoxybenzene is used for producing oxadiazon. The problem in treatment of the oxadiazon etherifying salt waste is solved. The method is scientific, reasonable, simple to operate, significant in economic benefits and social benefits and suitable for application in industrial production.

The invention relates to the field of a pesticide synthetic process and discloses a synthetic method of oxadiazon. The synthetic method is used for synthesizing the oxadiazon by carrying out a cyclization reaction on 2,4-dichloro isopropoxy benzhydrazide and dimethyl carbonate under catalysis of sodium alcoholate. The synthetic method disclosed by the invention is carried out in the presence of catalytic amount of the sodium alcoholate by taking the dimethyl carbonate as a carbonylation ring-closing reagent; the dimethyl carbonate is not only taken as a reactant, but also taken as a reaction solvent; a reaction byproduct only has methanol, application of highly-toxic and dangerous chemical substances is avoided, and highly-toxic phosgene is not generated by decomposition, so that no pollution is caused to an environment, and therefore, the synthetic method is safe and environment-friendly, and defects of the conventional process are overcome.

The invention discloses a preparation method of o-isopropoxyphenol. The method is characterized by taking catechol and 2-chloropropane as raw materials, taking a binary-immiscible organic solvent system as a reaction solvent, and preparing the o-isopropoxyphenol by reaction at normal pressure or slight positive pressure in the presence of an acid binding agent and a catalyst. The reaction yield is more than or equal to 94.0% (based on the catechol). The preparation method has the advantages of cheap raw materials, simple process, mild reaction condition, industrialization applicable solvent and low content of the catechol in the reaction solution, thus reducing difficulty of product refinement and greatly reducing energy consumption and three-waste volume.

The invention belongs to a medical intermediate, and particularly relates to a synthesis method of 4-amino-2-hydroxy-3-isopropoxybenzoic acid. The synthesis method of the 4-amino-2-hydroxy-3-isopropoxybenzoic acid is provided for the first time, a synthesis route is provided for the synthesis method of the 4-amino-2-hydroxy-3-isopropoxybenzoic acid, the synthesis method is short in route, reasonable in design, easy to operate and easy to control, and meanwhile the yield of the obtained product is high.

The invention discloses a preparation method of 3-cyano-4-isopropoxybenzoic acid. The preparation method comprises the following steps: step one, preparing 3-formyl-4-phenyl hydroxybenzoate from 4-phenyl hydroxybenzoate; step two, preparing 3-cyano-4-phenyl hydroxybenzoate from the 3-formyl-4-phenyl hydroxybenzoate; step three, preparing 3-cyano-4-phenyl isopropoxybenzoate from the 3-cyano-4-phenyl hydroxybenzoate; step four, preparing the 3-cyano-4-isopropoxybenzoic acid from the 3-cyano-4-phenyl isopropoxybenzoate. The preparation method of the 3-cyano-4-isopropoxybenzoic acid, disclosed by the invention, has the advantages that (1) the use of a highly toxic cyanide-cuprous cyanide in the prior art is avoided, and the preparation method is more suitable for industrialization; (2) cyanogroup is prepared from formyl groups, and the preparation method is efficient and direct and is suitable for large-scale production; (3) all raw materials are cheap and easy to obtain, and the cost advantage is obvious.

The invention discloses preparation of a loaded Grubbs catalyst and application of loaded Grubbs catalyst. The preparation is characterized in that: the catalyst is obtained by using the compound obtained by the amidation reaction of 3-3-ethenyl-4-isopropoxyphenyl-propionic acid as a loading precursor and then enabling the compound to carry out exchange complexation respectively with phenyl methylene-bistricyclohexylphosphine-dichlororuthenium or 1, 3-bis 2, 4, 6-trimethylphenyl-2-imidazolidinylidene-dichorobenzenemethylene-tricyclohexylphosphineruthenium; the catalyst is used for the olefin metathesis reaction of N,N-diallyl-4-methylbenzenesulfonamide and has quite strong catalytic activity. Compared with the prior art, the catalyst of the invention is simple in process and convenient in preparation, and can be recycled many times and keep excellent catalytic activity, thereby greatly reducing the heavy metal pollution caused by Grubbs type catalysts to the product of olefin metathesis reaction and developing a new way for green and environmentally-friendly organic synthetic chemistry.

The invention discloses a synthesis method of an oxadiazon intermediate. The synthesis method comprises following steps: m-aminophenol is taken as an initial raw material; m-aminophenol is subjected to an acylation reaction, and a reaction solution A is obtained; the reaction solution A is subjected to a chlorination reaction, and 2,4-dichloro-5hydroxyacetanilide is obtained; 2,4-dichloro-5hydroxyacetanilide is subjected to an etherification reaction, and 2,4-dichloro-5isopropoxyacetaniline is obtained; 2,4-dichloro-5isopropoxyacetaniline is subjected to deprotection, and 2,4-dichloro-5isopropoxyaniline is obtained. With the adoption of the synthesis method of 2,4-dichloro-5-isopropoxyaniline, environmental pollution is avoided, few technological steps are required, and the yield is high.

The invention discloses long-acting chlorine-resistant fiber cloth for swimsuits. The chlorine-resistant fiber cloth comprises, by weight, 115 parts of polyester fibers, 15 parts of nanometer titanium dioxide, 1 part of tetrakis hydroxymethyl phosphonium sulfate, 2 parts of 5- hydroxy -1-tetralone, 2 parts of 4-cyclohexanone carboxylate, 1.5 parts of 2',4'-acetylphosphoramidothioate acetanilide, 3 parts of sodium pentanesulfonate, 2 parts of 4-isopropyl benzene sulfonyl chloride, 5 parts of 5-amino-2-methyl benzene sulfonic acid, 5 parts of sulfosuccinate butanedioic acid dioctyl phthalate sodium salt, 1 part of softener and 1 part of antioxidants.

The invention discloses a preparation method for 3-cyano-4-isopropoxy phenyl benzoate. The method comprises the following steps: 1) preparing 3-aldehyde-4-phenyl hydroxybenzoate from 4-phenyl-hydroxybenzoate; 2) preparing 3-cyano-4-phenyl-hydroxybenzoate from 3-aldehyde-4-phenyl hydroxybenzoate; and 3) preparing 3-cyano-4-isopropoxy phenyl benzoate from 3-cyano-4-phenyl-hydroxybenzoate. The preparation method for 3-cyano-4-isopropoxy phenyl benzoate disclosed by the invention has the advantages that: 1) the use of cuprous cyanide, which belongs to highly toxic cyanide, used in the prior art is avoided and the method is more suitable for industrialization; 2) the cyano group is prepared from the aldehyde group and the preparation is efficient and direct and is suitable for mass production; and 3) all the raw materials are low-cost and easily acquired and the cost advantage is obvious.

The invention discloses a synthesis method for 2, 4-dichloro-5-isopropoxyaniline. The method comprises the following steps: feeding an auxiliary agent and a catalyst into a reaction kettle, so as to obtain first mixed liquor; feeding an organic solvent and an original compound into the first mixed liquor, and feeding hydrogen into the reaction kettle, so as to ensure that the original compound performs reduction reaction in the condition of the existence of the organic solvent, the auxiliary agent and the catalyst and obtain a reaction product; removing the catalyst and solvent of the reactionproduct, so as to obtain the 2, 4-dichloro-5-isopropoxyaniline. The catalyst adopts a nano-catalyst. The method simplifies synthesis steps of the 2, 4-dichloro-5-isopropoxyaniline, reduces the cost and the recycling difficulty of the catalyst, and meanwhile avoids ricks in traditional technical processes.