A modification of the plöchl-erlenmeyer reaction. I. Synthesis of 2-phenyl-4-diphenylmethylene-5(4H)-oxazolone
作者:Ginka G. Ivanova
DOI:10.1016/s0040-4020(01)80590-1
日期:1992.1
found to be an effective reagent in the Erlenmeyer azlactone synthesis. 2-Phenyl-4-diphenylmethylene-5(4H)-oxazolone (1) has been synthesized by the reaction of 2-phenyl-5(4H)-oxazolone (A) with N-methyl-diphenylmethanimine (B), contrary to previous attempts using benzophenone or its imines from aniline, benzylamine or n-butylamine. Quantitative reaction yield (UV-spectral determination) was achieved
已发现N-甲基酮亚丁胺是Erlenmeyer氮杂内酯合成中的有效试剂。与以前相反,通过2-苯基-5(4H)-恶唑酮(A)与N-甲基-二苯基甲亚胺(B)的反应合成了2-苯基-4-二苯基亚甲基-5(4H)-恶唑酮(1)尝试从苯胺,苄胺或正丁胺中使用二苯甲酮或其亚胺。以A:B = 3:1达到定量反应收率(紫外光谱测定)。描述了确保良好收率1的反应条件。N-甲基马尿酰胺(3),N-甲基-2-(N-苯甲酰基氨基)-3,3-二苯基丙烯酰胺(5),2-(N-苯甲酰基氨基)-3,3-二苯基丙烯酸(7)及其乙酯(8)也有报道。