Synthesis And Characterization Of Heterocyclic Compound

Fine organic chemicals are widely used in various industries of the national economy,which play an important role in improving the quality,saving energy,increasing production,improving and enhancing people’s lives,it is the focus of competing in word markets.This paper synthesised of three types of heterocyclic compound,including fulgimides,pyrazine derivatives and piperine derivatives;This article has used the Stobbe condensation reaction,the hydrolysis reaction and dehydration reaction and amination anhydride reaction to prepare fulgimides.The product were characterized and confirmed by]H NMR and HR-MS,and it,s discoloration performance was verified.In this paper,the Suzuki coupling reactions of chlorinated pyrazine with arylboronic acids were carried out to synthesis some novel pyrazine derivatives in presence of Pb(PPh3)4.All products were characterized and confirmed by 1H NMR,IR and EI-MS.The conditions of reaction has been determined,and the influence of different substituents on the reaction has been discussed in the experiments.In this paper,several new piperine derivatives has been synthesized by using piperonylic acid as the starting material.All products were characterized and confirmed by ’H NMR,IR and ESI-MS.The results showed:in the synthesis process of aromatic amine piperine derivatives,using pyridine as solvent,the yield can be increasd greatly.