Enaminones were efficiently prepared via modification for Gupton method, which depends on carrying out the latter procedure in one step reaction, avoiding the isolation of [3-(dimethylamino)-2-azaprop-2-en-1- ylidene]dimethylammonium chloride (Golds reagent) (5) which is prepared in situ from cyanuric chloride (4) then it reacts successfully with ketone 1a-j to produce the enaminones 3a-j in suitable yields. The modified method overcomes the drawbacks of the known methods for preparation of enaminones.
通过对Gupton方法的改进,有效地制备了烯酰胺。这一过程依赖于在一步反应中进行,避免了对[3-(二甲基
氨基)-2-氮杂丙-2-烯-1-亚基]二甲基
铵氯化物(Golds试剂)(5)的分离,该试剂是通过
氰尿酸氯(4)原位制备的,随后与酮1a-j成功反应,生成产率适宜的烯酰胺3a-j。改进的方法克服了已知烯酰胺制备方法的缺点。