Synthesis method of intermediate bis(carboxylcyclopentadiene)iron
A technology of cyclopentadiene, synthesis method, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, organic chemistry, etc., can solve the problem of slow reaction, low yield and limited large-scale industrial application and other issues
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Embodiment 1
[0018] 1. A synthetic method for intermediate bis(carboxycyclopentadiene)iron, characterized in that the method comprises the following steps:
[0019] Step 1. Dissolve 1mol of 1,1'-diacetylferrocene and 2.5mol of cuprous chloride in 350ml of [C 5 mim]HSO 4 In the ionic liquid, after stirring and reacting at 50°C for 1h, the temperature was raised to 95°C and then stirred for 1h;
[0020] Step 2. After cooling, add 150ml of [C 5 mim]HSO 4 The ionic liquid is continuously stirred at a certain temperature, and the solution of the product is obtained after the reaction is completed;
[0021] Step 3, filter the solution of the product while it is hot, and the filtrate is acidified to pH=2 with concentrated hydrochloric acid, a large amount of yellow precipitates are formed, and the crude product is obtained after suction filtration;
[0022] Step 4, put the obtained product in a beaker, add 10% NaOH solution to dissolve all the product;
[0023] Step 5, filter the solution, a...
Embodiment 2
[0031] Step 1. Dissolve 0.8mol of 1,1'-diacetylferrocene and 2.5mol of cuprous chloride in 350ml of [C 5 mim]HSO 4 In the ionic liquid, after stirring and reacting at 50° C. for 1 h, the temperature was raised to 95° C. and then stirred for 1 h; the rest of the steps were the same as in Example 1.
Embodiment 3
[0033] Step 1. Dissolve 0.6mol of 1,1'-diacetylferrocene and 2.5mol of cuprous chloride in 350ml of [C 5 mim]HSO 4 In the ionic liquid, after stirring and reacting at 50° C. for 1 h, the temperature was raised to 95° C. and then stirred for 1 h; the rest of the steps were the same as in Example 1.
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