Novel N-alkoxycarbonyl- and N-alkoxythiocarbonyl-amidines and a process for the preparation of alkoxycarbonyl- and alkoxythiocarbonyl- amidines by reacting an amidine with an ester of chlorocarbonic acid or chlorothiocarbonic acid in the presence of an inorganic acid acceptor and a 2-phase aqueous/organic solvent mixture at from 0.degree. to 60.degree.0 C. The novel end products which can be prepared by this process are useful starting materials for crop protection agents, and can be used in particular for the preparation of novel, selective herbicides.
新型N-烷氧羰基和N-烷氧
硫羰基
脲以及一种制备烷氧羰基和烷氧
硫羰基
脲的方法,该方法通过在
无机酸受体和2相
水/有机溶剂混合物的存在下,将
脲与
氯碳酸酯或
氯硫酸酯的酯反应,反应温度为0℃至60℃。通过该方法可以制备有用的农药起始原料,尤其是用于制备新型选择性
除草剂的原料。