35results about How to "Suitable for synthesis" patented technology

The present invention discloses a hypothermal alkali liquation synthesis process of monocrystalline nanometer materials of oxygenous metal inorganic compounds. The compound oxide monocrystalline nanometer materials are synthesized with the inorganic salt of a metal and the oxide of another metal as main materials, melted mixed alkali as solvent, at atmospheric pressure and relatively low temperature of about 200DEG C. The present invention uses melted alkali as solvent for the first time and can synthesize oxide nanometer materials of different structures, compositions and functions, or monocrystalline nanometer materials of simple oxide and hydroxide. This process utilizes conventional materials and only controls the time and temperature during synthesis in favor of the industrial application. The produced monocrystalline nanometer materials includes ferroelectric and piezoelectric materials, ferromagnetic materials, semiconductive materials, ionic conductive materials, colossal magnetoresistance materials, high dielectric materials superconductors and etc. that can be applied to microelectronics, photoelectronics and communication.

The invention relates to synthesis of methyl benzoate, in particular to a synthesis method of methyl benzoate by carbonylation of bromobenzene catalyzed by non-noble metal through photochemical catalysis under mild condition. The method adopts the technical proposal comprising the following steps: filling 0.10-0.15 Mpa CO into a solution consisting of 50-200 mmol / L of bromobenzene, 5-20 mmol / L ofCo(OAc)2 or CoCl2 as a catalyst and 100-1,000 mmol / l of alkali additive NaOCH3 or NaOAc, irradiating the solution by a 100-400W high voltage mercury lamp for 1-5 hours, and reacting at a temperature of between 15 and 25 DEG C. Preferably the methanol solution consisting of 50-200 mmol / L of bromobenzene, 5-20 mmol / L of Co(OAc)2 or CoCl2 as a catalyst and 100-1,000 mmol / l of alkali additive NaOCH3 or NaOAc is further added with 50-500 mmol / L of hypnone or benzophenone. The synthesis method has mild reaction condition, catalyzes reaction by simple non-noble metal salt, directly functionalizes bromobenzene, has high yield and selectivity (both can reach 91 percent) of the methyl benzoate, and is suitable for small scale production of methyl benzoate with high added value.

The present invention relates to 7-phenylacetamido-3-desacetoxy cephalosporanic acid salt and its preparation method and application. Described 7-phenylacetamido-3-desacetoxy cephalosporanate has the following structural formula: wherein, M + selected from metal ions or ammonium ions. A method for preparing 7-phenylacetamido-3-desacetoxycephalosporanic acid salt, comprising the steps of: reacting 7-phenylacetamido-3-desacetoxycephalosporanic acid with an alkaline salt-forming agent; Or it can be obtained by reacting 7-phenylacetamido-3-desacetoxy cephalosporanic acid trimethylsilyl ester with alkaline salt-forming agent. 7-ADCA can be prepared by 7-phenylacetamido-3-desacetoxycephalosporanate, and the content of the obtained 7-ADCA product is very high, especially the content of the isomer △2-7-ADCA Less than 0.5%, it is more suitable for synthesizing high-quality cephalexin bulk drugs such as cephalexin, cephradine, cefadroxil and ceftazidime pivoxil.

The invention relates to a method for preparing methyl-carboxylate by photo-promoted carbonylation reaction of chloro alkane on the moderate condition of non-noble metal catalysis, under the catalysis of non-noble metal catalyst cadmium, making chloro alkane and CO or CO2 perform photo- promoted carbonylation reaction in the methanol to produce the methyl-carboxylate which increases one C as compared with the chloro alkane, where the chloro alkane in the reaction is chloro cyclohexane and / or 1-chloro octane; the catalyst is selected from (a) 4-20mmol / L CdI2, (b) combination of 5-20mmol / L CdCl2 and 4-20mmol / L NaI, or (c) combination of 5-20mmol / L Cd(NO3)2 and 4-20mmol / L NaI. And it adopts non-noble metal compound as catalyst and uses chloro alkane as substrate; and the reacting condition is moderate, the cost is low, and it is suitable for small-scale and high-added value methyl-carboxylate synthesis.

The invention relates to a method of C=C bond catalysis transfer hydrogenation reaction, in particular to a method of NiCl2 catalysis 1-octylene transfer hydrogenation reaction under the condition of mild illumination. The method comprises: methanol solution containing 20-100m mol / L of 1-octylene and 5-15 m mol / L of NiCl2 catalyst is irradiated for 10-30h by a high-voltage mercury lamp of 100-400W at the temperature of 15-80 DEG C; if the reaction temperature is 15-25 DEG C, 50-300 m mol / L of tri-n-butylamine is added into the reaction system to improve the activity and selectivity of the reaction; if the reaction temperature is 26-80 DEG C, the tri-n-butylamine is not needed to be added. The method has mild reaction condition, is used for catalyzing simple commercial salt of non-noble metal, avoids using combustible hydrogen as hydrogen source, has high safety and is applicable to the synthesis of fine chemicals with small scale and high added value.