脱氢醋酸(Dehydroacetic Acid DHA)的系统命名是3-乙酰基-6-甲基-二氢吡喃-2,4-(3H)二酮由于它具有很好的抑菌和杀菌效能,特别是对霉菌最有效,同时对人畜毒性很小,所以它在食品与药物工业中有着广泛应用的前途。脱氢醋酸可通过两条合成路线制造:(1)乙酰乙酸乙酯缩合;(2)双乙烯酮二聚。 (1)乙酰乙酸乙酯缩合法: 乙酰乙酸乙酯可呈两种互变异构体存在: The system name for Dehydroacetic Acid DHA is 3-Acetyl-6-methyl-dihydropyran-2,4- (3H) -dione due to its good bacteriostatic and bactericidal efficacy, especially It is the most effective against mold and has little toxicity to humans and animals, so it has a promising future in the food and drug industry. Dehydroacetic acid can be made by two synthetic routes: (1) ethyl acetoacetate condensation; (2) diketene dimerization. (1) ethyl acetoacetate condensation method: ethyl acetoacetate can exist as two tautomers: