Synthesis of 1-substituted 2-azaspiro[4.5]deca-6,9-diene-8-ones and 2-azaspiro[4.5]deca-1,6,9-triene-8-ones by a three-component condensation of 1,2,3-, 1,2,4- or 1,3,5-trimethoxybenzene with isobutyric aldehyde and nitriles
作者:Vladimir A. Glushkov、Olga G. Stryapunina、Alexey A. Gorbunov、Olga A. Maiorova、Pavel A. Slepukhin、Sandra Ya. Ryabukhina、Elena V. Khorosheva、Valentina I. Sokol、Yurii V. Shklyaev
DOI:10.1016/j.tet.2009.11.055
日期:2010.1
aldehyde and alkyl cyanoacetates in the presence of sulfuric acid resulted in the formation of substituted 2-azaspiro[4.5]deca-6,9-diene-8-ones. The same reaction of aromatic nitriles yielded 2-azaspiro[4.5]deca-1,6,9-triene-8-ones; in the case of 1,2,3-trimethoxybenzene corresponding Ritter amides were also observed. The condensation of 1,3,5-trimethoxybenzene with isobutyric aldehyde and alkyl cyanoacetates
在硫酸存在下,1,2,3-或1,2,4-三甲氧基苯与异丁醛和氰基乙酸烷基酯的三组分缩合导致形成取代的2-azaspiro [4.5] deca-6,9-二烯-8-ones。芳族腈的相同反应生成2-azaspiro [4.5] deca-1,6,9-triene-8-ones; 在1,2,3-三甲氧基苯的情况下,也观察到相应的Ritter酰胺。1,3,5-三甲氧基苯与异丁醛和氰基乙酸烷基酯的缩合提供了正式的Knöevenagel缩合的化合物。