双乙烯酮(Diketene)又名乙酰基乙烯酮或乙酰基乙酰β-内酯。由于双乙烯酮分子结构中有两个双建,因而具有高度的不饱和性,化学性质极为活泼,可进行加成、分解、硝化、聚合等反应,是重要的农药合成中间体,可衍生出多种产品,在农药中的用途相当广泛。在农药工业中,双乙烯酮与异丁酰胺、异丁腈、异丁酸酯等反应生成2-异丙基-4-甲基-6-羟基嘧啶,该化合物再与乙基氯化物反应得到有机磷杀虫剂二嗪农,可用于玉米、蔬菜、果树、水稻等农作物,是一种 Diketene is also known as acetylketene or acetoacetyl-beta-lactone. Because diketene has two double bonds in its molecular structure, it has a high degree of unsaturation, and is very active in chemical properties. It can be added, decomposed, nitrified, polymerized and other reactions. It is an important pesticide synthesis intermediate, Products, the use of pesticides is quite extensive. In the pesticide industry, diketene is reacted with isobutyramide, isobutyronitrile, isobutyrate and the like to form 2-isopropyl-4-methyl-6-hydroxypyrimidine, which is then reacted with ethyl chloride to obtain organophosphorus Insecticide Diazinon can be used for corn, vegetables, fruit trees, rice and other crops, is a species