2,2'-bis(2-hydroxy-4-sulfonic-1-naphthylamine azoxyl)-5,5'-dimethyl-4,4'-bithiazole and preparation method thereof
A naphthylaminoazo and bithiazole technology, which is applied in the field of diheterocyclic triazene compounds, can solve the problems of fluorescence detection of few metal ions, and the selectivity and sensitivity need to be improved, and achieves simple preparation method, high sensitivity, Sensitive effect
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[0040] 2, 2'-bis(2-hydroxy-4-sulfonic acid-1-naphthylaminoazo)-5, 5' - Dimethyl-4, 4' - Bithiazole (BHSNAADMBT), its molecular structural formula:
[0041]
[0042] 2, 2'-bis(2-hydroxy-4-sulfonic acid-1-naphthylaminoazo)-5, 5' - Dimethyl-4, 4' - The preparation method of bithiazole (BHSNAADMBT), comprises the following steps:
[0043] (1) Preparation of 2,5-dibromohexanedione
[0044] Add 28.5g (0.25mol) of 3,4-hexanedione, 45mL of chloroform and 10mL of glacial acetic acid into a 250mL three-necked flask equipped with a magnetic stirrer dropping funnel and a reflux device, stir and heat to about 80°C on an oil bath , Slowly drop the mixture of 80g liquid bromine and 30mL chloroform from the separatory funnel, and the reaction starts immediately. After the bromine is added dropwise, continue to heat until the solution turns from brown-red to orange-yellow, then quickly cool it to 0°C in an ice bath, and a yellow needle-like precipitate will appear. Filter it with ...
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