Abstract Alkyl (E)-2-(3-Alkyl-5-oxo-1-phenyl-1,5-dihydro-4H-pyrazol-4-ylidene)-5-(alkylamino)-1,3-dithiole-4-carboxylates have been obtained by condensation of 2-pyrazolin-5-ones with carbon disulfide followed by ring formation with phosphorylated hydroxyketenimines [generated in situ from Nef-isocyanide-Perkow reaction] in the presence of Et3N. The structure of target compounds was confirmed by X-ray
摘要 烷基 (E)-2-(3-烷基-5-氧代-1-苯基-1,5-二氢-4H-
吡唑-4-亚基)-5-(烷基
氨基)-1,3-二
硫醇-4-在 Et3N 存在下,通过 2-
吡唑啉-5-酮与
二硫化碳缩合,然后与
磷酸化羟基烯酮
亚胺 [由 Nef-异
氰化物-Perkow 反应原位生成] 形成环,获得了
羧酸盐。目标化合物的结构由X射线衍射研究证实。产品的良好收率、非对映选择性和缺乏活化剂或
金属
促进剂是该方法的主要优点。图形概要