Spirocyclohexadienones: IX. Synthesis of 1-alkoxycarbonylmethylidene-6,10-dimethoxy-8-[(alkoxycarbonyl)cyanomethylidene]-3,3-R2-2-azaspiro[4.5]deca-6,9-dienes by four-component condensation of 1,3,5-trimethoxybenzene with α-branched aldehydes and alkyl cyanoacetates
作者:O. G. Stryapunina、I. V. Plekhanova、O. A. Maiorova、V. A. Glushkov、Yu. V. Shklyaev
DOI:10.1134/s107042800812004x
日期:2008.12
Four-component condensation of 1,3,5-trimethoxybenzene, a C-2-synton, and alkyl cyanoacetate in the presence of concentrated sulfuric acid gave the corresponding 1-alkoxycarbonylmethylidene-6,10-dimethoxy-8-[(alkoxycarbonyl)cyanomethylidene]-3,3-R-2-2-azaspiro[4.5]deca-6,9-dienes.