This paper describes a modified method of preparation of a number of α-aryl-α-(pyridazin-3-yl)-acetonitriles via the C-arylation reaction of the corresponding carbanionsof phenylacetonitriles using 3-chloropyridazine derivatives. KOH and DMSO were used inthe deprotonation process, which made the reaction very simple and safe to perform.Nitriles were obtained in the hydrolysis reaction to the corresponding α-aryl-α-(pyridazin-3-yl)-acetamide derivatives, which were next subjected to cyclization to afford the finalproducts. A number of new derivatives of 7H,8H-pyrimido[1,6-b]pyridazin-6,8-dione weresynthesized in the cyclocondensation reaction of respective α-aryl-α-(pyridazin-3-yl)-acetamides with diethyl carbonate in the presence of EtONa. The structure andcomposition of the new compounds were confirmed by IR, 1H- and 13C- NMR analysesand by elemental C, H and N analysis.
本文描述了一种改进的方法,通过将相应的
苯乙腈的碳阴离子与3-
氯吡嗪衍
生物进行C-芳基化反应,制备多种α-芳基-α-(
吡嗪-3-基)-
乙腈。去质子化过程中使用了KOH和
DMSO,使得反应非常简单并且安全。通过
水解反应得到相应的α-芳基-α-(
吡嗪-3-基)-乙酰酰胺衍
生物,随后对其进行环化以获得最终产物。在与乙基
碳酸酯和EtONa反应的相应α-芳基-α-(
吡嗪-3-基)-乙酰酰胺的环缩合反应中合成了一系列新的7H, 8H-
吡咯并[1,6-b]
吡嗪-6,8-二酮衍
生物。新化合物的结构和成分通过IR、1H-和13C-NMR分析及元素分析(C、H和N)得到了确认。