Reaction of Nitromethane with Cinnamoyl Derivatives of Cyclic β-dicarbonyl Compounds. Application to the Synthesis of 2(3)-(4-aryl-pyrrolidin-2-ylidene)-1,3(2,4)-diones*
作者:F. S. Pashkovsky、J. S. Dontsu、D. B. Rubinov、F. A. Lakhvich
DOI:10.1007/s10593-014-1606-0
日期:2015.1
that reaction of nitromethane with cinnamoyl derivatives of five- and six-membered carbo- and heterocylic β-dicarbonyl compounds in the presence of 1,1,3,3-tetramethylguanidine proceeds according to the mechanism of 1,4-conjugate addition to the enone fragment of cinnamoyl moiety to give 2(3)-( 3-aryl-4-nitrobutanoyl)-substituted cyclic 1,3- or 2,4-diones in good to excellent yields. Chemoselective reduction
我们已经表明,在1,1,3,3-四甲基胍存在下,硝基甲烷与五元和六元碳环和杂环β-二羰基化合物的肉桂酰基衍生物的反应根据1,4-共轭加成的机理进行在肉桂酰基部分的烯酮片段上,以良好或极好的收率得到2(3)-(3-芳基-4-硝基丁酰基)-取代的环状1,3-或2,4-二酮。后者的硝基官能团的化学选择性还原导致合成上有用的和生物学上有趣的2(3)-(4-芳基吡咯烷丁-2-亚基)衍生物。