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Abstract: This paper presents the resonance structure of C. C was synthesized by A and B in absolute ethanol with the catalyst. The structure of C was characterized through 1H NMR and 13C NMR. The process conditions are as follows£ºn(A)£ºn(B)=1¡Ã2, the amount of catalyst is 2¡ë of theoretical yield. The yield of the frist batch was 88% above, and it was closed to 100% when the reaction solution was recycled. Compared with the traditional process, this process has no pollution. It has great market prospects.

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Abstract: The resonance structure of C is presented in this literature.  C was obtained through A and B in absolute ethanol with certain catalyst, whoes structure of C was characterized through 1H NMR and 13C NMR. The process conditions are as follows£ºn(A)£ºn(B)=1¡Ã2, and the amount of catalyst is 2¡ë of theoretical yield. The yield of the frist batch was above 88%, and it was almost 100% if the reaction solution was recycled. Compared with the traditional process, this process makes no pollution possessing great market prospects.
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