Study of N-Substituted Phenylmaleimide Synthesis with <sup>1</sup>H-NMR

LIU Xiang-xuan; WANG Xuan-jun; YANG Xu-jie; WANG Xin; LU Lu-de

LIU Xiang-xuan, WANG Xuan-jun, YANG Xu-jie, WANG Xin, LU Lu-de. Study of N-Substituted Phenylmaleimide Synthesis with 1H-NMR[J]. Analysis and Testing Technology and Instruments, 2004, (1): 53-56.

Citation:

LIU Xiang-xuan, WANG Xuan-jun, YANG Xu-jie, WANG Xin, LU Lu-de. Study of N-Substituted Phenylmaleimide Synthesis with 1H-NMR[J]. Analysis and Testing Technology and Instruments, 2004, (1): 53-56.

Citation:

LIU Xiang-xuan, WANG Xuan-jun, YANG Xu-jie, WANG Xin, LU Lu-de. Study of N-Substituted Phenylmaleimide Synthesis with 1H-NMR[J]. Analysis and Testing Technology and Instruments, 2004, (1): 53-56.

Study of N-Substituted Phenylmaleimide Synthesis with ¹H-NMR

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Abstract

The preparation and cyclodehydration of N-Substituted phenylmaleamic acids were studied. The raw material, N-Substituted phenylmaleamic acids, N-Substituted phenylmaleimides and their mixture have been characterized by nuclear magnetic resonance spectroscopy. From the appearance,decrease or change of COOH proton resonance (～10 ppm), HC=CH proton resonance peak, conversion characterization of maleamic acids and maleimides were determined. The chemical shifts related to draw electron of substituting group and coupling constant were investgerted.

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Study of N-Substituted Phenylmaleimide Synthesis with 1H-NMR

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Study of N-Substituted Phenylmaleimide Synthesis with ¹H-NMR