申请人:Eli Lilly and Company
公开号:US04013658A1
公开(公告)日:1977-03-22
A series of 3,5-diphenyl-4(1H)-pyridazinones are synthesized by a two-step process, both steps of which are new. In the first step, a phenylglyoxyloyl halide is reacted with a styrylamine in the presence of a base to form a 1-amino-2,4-diphenyl-1-buten-3,4-dione. In the second step, the enaminoketone formed in the first step is reacted with hydrazine or an alkylhydrazine to form the pyridazinone. Both steps of the reaction proceed in good yields at temperatures in the range of from about 0.degree. C. to about 40.degree. C. in the common reaction solvents.
通过一个两步反应合成了一系列3,5-二苯基-4(1H)-吡啶酮,两个步骤都是新的。在第一步中,苯基乙酰卤与苯乙烯胺在碱的存在下反应,形成1-氨基-2,4-二苯基-1-丁烯-3,4-二酮。在第二步中,第一步中形成的烯胺酮与肼或烷基肼反应形成吡啶酮。在常见的反应溶剂中,反应温度在0°C到40°C范围内,两个步骤的反应产率都很高。