Utility of Enaminonitriles in Heterocyclic Synthesis: Synthesis of Some New Pyrazole, Pyridine, and Pyrimidine Derivatives
作者:Ahmed A. Fadda、Hassan A. Etman、Mohamed Y. El-Seidy、Khaled M. Elattar
DOI:10.1002/jhet.855
日期:2012.7
16–21. Moreover, the reaction of enaminonitrile 3 with carbon disulfide in pyridine afforded the pyrimidine derivative 22, whereas, in NaOH/DMF followed by the addition of dimethyl sulphate afforded methyl carbonodithioate 24. The reaction of enaminonitrile derivatives 3–5 with phenylisothiocyanate afforded the thiopyrimidine derivatives 25a–c. Finally, the enaminonitrile 4 reacted with 3‐(4‐chloro‐ph
起始(1,5-二甲基-3-氧代-2-苯基-2,3-二氢-1 H-吡唑-4-基)羰基肼基酰基二氰化物(2)被用作合成3-氨基2-(1,5-二甲基-3-氧代-2-苯基-2,3-二氢-1- ħ吡唑-4-基偶氮) - [3-取代] -1-基-丙烯腈衍生物(3 - 10) 。此外,腈衍生物2与水合肼或丙二腈反应,分别得到相应的3,5-二氨基吡唑11和烯胺腈衍生物13。另一方面,使化合物3与丙二腈,乙酸酐,原甲酸三乙酯,N,N反应。二甲基甲酰胺(DMF)-dimethylacetal,硫脲,和羟胺hydrchloride得到安替比林衍生物16 - 21。此外,烯氨基腈3与二硫化碳在吡啶中的反应提供了嘧啶衍生物22,而在NaOH / DMF中随后加入硫酸二甲酯得到了碳二硫代碳酸酯24。enaminonitrile衍生物的反应3 - 5与异硫氰酸苯酯,得到硫代嘧啶衍生物25A - Ç。最后,对氨基腈4与3