Chemical Properties: Colorless crystal
Usage: Used in pharmaceuticals, organic synthesis, and as a general reagent. Used as liquid crystal intermediate and used in the synthesis of conductivity.
Production Method: Add the prepared sodium ethoxide into the reaction kettle, then add ether and diethyl succinate, reflux in water for 3 days, and recover the ether; then cool to room temperature, add 10% dilute sulfuric acid to adjust to pH=2 , filter out the crystals, wash with water, and dry to obtain the crude Chemicalbook diethyl succinate; recrystallize the crude product with ethanol (melting point 127-129°C) to obtain the pure product. Then put diethyl succinate back into the flask, add a mixture of concentrated sulfuric acid, water, and ethanol, reflux in oil for 5 days, cool, and neutralize with ammonia to pH = 8; then extract with chloroform 4 times , recover the chloroform to obtain the crude product; then distill the crude product under reduced pressure, pour the distillate into cold petroleum ether, filter and dry to obtain the 1,4-cyclohexanedione product.
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