Synthetic method of 2-mercaptobenzimidazole allyl sulfide
A technology of mercaptobenzimidazolene propylene sulfide and mercaptobenzimidazole, which is applied in the fields of iron and steel, petrochemical, electric power and construction, and petroleum, can solve the problems of high production cost and unfavorable industrialization, and achieve high yield and synthetic reaction The effect of mild conditions and simple process
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[0021] Example 1:
[0022] 1) Under the protection of nitrogen, add 1 part (2.4g) of 2-mercaptobenzimidazole and 4 (9.6g) parts of acetone into the reaction kettle, and magnetically stir until 2-mercaptobenzimidazole Fully dissolve evenly.
[0023] 2) After the dissolution is uniform, add 5 parts (12g) of 26% potassium hydroxide solution into the reaction kettle, and then quickly add 0.2 parts (0.48g) of tetrabutylammonium bromide, and magnetically stir to make it uniform.
[0024] 3) Add 1 part (2.4g) of allyl chloride dropwise, and keep stirring at room temperature for 3h.
[0025] 4) After filtering and drying, the product is collected, and the product is obtained after further recrystallization and purification with acetone.
[0026] The prepared 2-mercaptobenzoallyl sulfide is a pale yellow solid crystal with a melting point between 125°C and 131°C.
Example Embodiment
[0027] Example 2:
[0028] 1) Under the protection of nitrogen, add 1 part (2.4g) of 2-mercaptobenzimidazole and 4 parts (9.6g) of tetrahydrofuran into the reaction kettle, and magnetically stir until 2-mercaptobenzimidazole Fully dissolve evenly.
[0029] 2) After the dissolution is uniform, add 5 parts (15g) of 26% potassium hydroxide solution into the reaction kettle, and then quickly add 0.2 parts (0.48) of tetrabutylammonium hydroxide, and magnetically stir to make it uniform.
[0030] 3) Add 1 part (2.4g) of allyl bromide dropwise, keep stirring at room temperature for 3h.
[0031] 4) After filtering and drying, the product is collected, and the product is obtained after further recrystallization and purification with acetone.
[0032] The prepared 2-mercaptobenzoallyl sulfide is a pale yellow solid crystal with a melting point between 125°C and 131°C.
Example Embodiment
[0033] Example 3:
[0034] 1) Under the protection of nitrogen, add 1.25 parts (3g) of 2-mercaptobenzimidazole and 5 parts (12g) of acetone into the reaction kettle, and stir magnetically until the 2-mercaptobenzimidazole is fully dissolved. Evenly.
[0035] 2) After the dissolution is uniform, add 4 parts (9.6g) of 26% potassium hydroxide solution into the reaction kettle, then quickly add 0.1 part (0.24g) of tetrabutylammonium hydroxide, and magnetically stir to make it uniform.
[0036] 3) Add 2 parts (4.8g) of allyl chloride dropwise, and keep stirring at room temperature for 3h.
[0037] 4) After filtering and drying, the product is collected, and the product is obtained after further recrystallization and purification with acetone.
[0038] The prepared 2-mercaptobenzoallyl sulfide is a pale yellow solid crystal with a melting point between 125°C and 131°C.
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