Supported by the National Natural Science Foundation of China (20976035, 21076059); the Natural Science Foundation of Hebei Province (B2010000019)
Toluene-2,4-bisurea (TBU) is an important intermediate for urea route to dimethyl toluene-2,4-dicarbamate and the study on TBU synthesis via the reaction of 2,4-toluene diamine (TDA) and urea is of great significance....
the Special Program of National Basic Research Program of China(973 Program)(Grant 2010CB234602);National Natural Science Foundation of China(Grant 21076059);the Natural Science Foundation of Tianjin City(Grant 12JCYBJC12800);the Key Basic Program of Applied Basic Research Plan of Hebei Province(Grant 12965642D).
To meet the demands of some kinds of reactions catalyzed simultaneously by Br?nsted acid and Lewis acid catalyst, two novel Br?nsted-Lewis acidic ionic liquids, 1-carboxyethylene-3-(4-zinc acetate sulfobutyl) imidazol...