Zhao Li-juan
2011
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Journal
Journal of Tianjin Polytechnic University
Abstract
With 3-methylthiophene and NBS as basic materials,2-bromo-3-methylthiophene and 2,5-dibromo-3-methylthiophene are synthesized.The method for analysing the concentration of reactant and product in solution by GC is given,and the reaction proceeding is determined by GC.The results show that when the reaction time is 8.5 h,reaction temperature is 40 ℃,the yield of 2-bromo-3-methyl thiophene is 87%,the purity is above 98%(GC).On the other hand,when the reaction time is 11 h at reflux,the yield of 2,5-dibromo-3-methylthiophene is 78%,the purity is above 98%(GC).The above products are characterized by IR and 1H NMR.