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
作者:V. A. Glushkov、O. G. Ausheva、S. N. Shurov、Yu. V. Shklyaev
DOI:10.1023/a:1016061607049
日期:——
1-R-3,3-Dimethyl-2-azaspiro[4.5]deca-1,6,9-trien-8-ones were synthesized through three-component condensation of anisole, isobutyraldehyde, and a corresponding nitrile in dichloromethane in the presence of concentrated sulfuric acid.