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| Different methods for the preparation of the aforementioned compounds have been described such as from 4,4-diaminodiphenylmethanes and amines, by condensation of amines and anilines in acid medium or using zeolites and also by oxidative coupling of anilines with metal catalyst or clay-mediated microwave-assisted chemistry from N,N-disubstituted anilines, in which DTMs are obtained in low to modest yields.ÆäÖм¸¸öÎïÖʲ»ÖªµÀ¿ÉÒÔ²»·Ò룡£¡£¡£¡¼±¼±¼±¡£¡£¡£¡£¡£ |
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