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The Synthesis of Dichlorocinnamic Acid

WANG Yan fang 1,XU Li yan 2, WANG Wei 1, HUANG Hui 1 (1.Institute of Chemistry and Biological Science,Jiangxi Normal University,Nanchang 330027,China;2.Jiangxi Post and Telecommunication School,Nanchang 330032,China)  
The dichlorobenzaldehyde which mainly includes two sorts of isomerides was used as crude materials,after being acetalated with ethyleneglycol and fractional distillated,2,3 dichlorobenzaldehyde ethyleneglycol acetal and 2,5 dichlorobenzaldehyde ethyleneglycol acetal with high purity have been produced.The acetals were hydrolysised with acid,then two sorts of dichlorobenzaldehyde with higher purity have been produced.Finally,two sorts of dichlorocinnamic acid were synthesised by Perkin reaction,and structual analysis has proved their configuration is E.
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