Preparation method of 5-bromine-1,2,3-benzene tricarbonic acid
A technology of trimellitic acid and concentrated sulfuric acid, applied in the field of organic bromides and polycarboxylic acid aromatics, can solve the problems of complicated preparation method and long reaction time, and achieve the effects of simple reaction conditions, simple operation and good yield.
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[0019] Example 1:
[0020] The raw materials used in the synthesis of 5-bromo-1,2,3-benzenetricarboxylic acid are 1,2,3-benzenetricarboxylic acid, concentrated sulfuric acid, NBS (N-bromosuccinimide), and the quality of ice is 1.26. g, 18.4g, 1.28g, 10g.
Example Embodiment
[0021] Example 2:
[0022] The raw materials used in the synthesis of 5-bromo-1,2,3-benzenetricarboxylic acid are 1,2,3-benzenetricarboxylic acid, concentrated sulfuric acid, NBS (N-bromosuccinimide), and the quality of ice is 12.6. g, 184g, 12.8g, 100g.
Example Embodiment
[0023] Example 3:
[0024] The raw materials used in the synthesis of 5-bromo-1,2,3-benzenetricarboxylic acid are 1,2,3-benzenetricarboxylic acid, concentrated sulfuric acid, NBS (N-bromosuccinimide), and the quality of ice is 25.2 g, 368g, 25.6g, 200g.
[0025] The reaction formula of the above process is as follows:
[0026]
[0027] 2. Product verification
[0028] figure 1 It is the infrared spectrum of the compound, the sample uses KBr tablet, the measurement range is 4000~400cm -1 . 1201cm -1 Where is the stretching vibration of the C-O bond, 1492cm -1 , 1579cm -1 The vibration absorption peak of the benzene ring skeleton at 1729cm -1 The sharp peak is the stretching vibration peak of carboxycarbonyl group, 3093cm -1 The stretching vibration peak of -OH on the carboxyl group, 3323cm -1 It is the stretching vibration peak of -OH on the water molecule.
[0029] The crystal structure of the compound was determined with a single crystal X-ray diffractometer. The SHELXTL program i...
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