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US4022817A Esters prepared from diacylium complexes of tetrahaloterephthalic acid 失效
由四卤对苯二甲酸二酰基络合物制备的酯

Esters prepared from diacylium complexes of tetrahaloterephthalic acid
摘要:
Diacylium complexes of tetrahaloterephthalic acid can be produced by reacting tetrahaloterephthalic acid with sulfur trioxide to form compounds capable of reacting with various nucleophilics.
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