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Dibenzo-18-crown ether-6 is a raw material for the synthesis of diaminodibenzo-18-crown ether-6, diaminodibenzo-18-crown ether-6 is an important crown ether compound, but also an important intermediate raw material for the synthesis of crown ether derivatives, the synthesis method is dibenzo-18-crown ether-6 as raw material, prepared by nitrification and reduction reaction, the reduction method used is Pd/C reduction method, which is limited by the high price of the catalyst. The traditional synthesis method of dibenzo-18-crown ether-6, the raw material for the synthesis of diaminodibenzo-18-Chemicalbook crown ether-6, is a reflux reaction under nitrogen protection, which has harsh conditions, cumbersome steps, long reaction cycle, high temperature and low yield. Ultrasonic synthesis is a new type of synthesis method developed in recent years. It has the advantages of good directionality, large energy and strong penetrating ability, which is more convenient and easy to operate than traditional organic synthesis methods, and the experimental equipment is relatively simple and easy to control, and it is more and more widely used in organic synthesis
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