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Aqueous systems substituted aryl boronic ester synthesis

Author: ZhangJie
Tutor: YeJiaHai
School: Nanjing University of Technology and Engineering
Course: Applied Chemistry
Keywords: Aryl borate Aryl diazonium fluoroborate CuBr Acetonitrile / water
CLC: TQ263.1
Type: Master's thesis
Year: 2012
Downloads: 62
Quote: 0
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Abstract


Aryl boric acid ester and replaced aryl boric acid ester in the chemical, biological, pharmaceutical, electronic, LCD, etc have widely application. So the aryl and replace the preparation of aryl boric acid ester synthesis has been the hot topics in the study of chemical workers. Based on aromatic fluoborate diazonium salt with boric acid pinacol ester as raw materials, using acetonitrile/water as solvent, and under the cuprous bromide catalytic synthesis of a series of replaced aryl boric acid ester. Reaction solvent for acetonitrile/water, environmental friendly; Catalyst cuprous bromide was cheap and simple post-processing. This study the reaction process is optimized. For methyl benzoate fluoborate diazonium salt with al boric acid pinacol ester as reaction substrate, the reaction temperature, catalyst type and dosage of catalyst, reaction time, solvent is optimized. Results show that the best reaction condition is: temperature to room temperature; Solvent for acetonitrile: water = 3:1; Catalyst for cuprous bromide 5% (mol); Reaction time is 3 h; Material ratio of 1:1. The product through rapid purification column chromatography method, using nuclear magnetic resonance hydrogen spectrum and mass spectrum analysis method to analyze all product characterization.

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CLC: > Industrial Technology > Chemical Industry > Basic Organic Chemistry Industry > The production of organic compounds of elements > The first III group elements, organic compounds > Boron organic compounds
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