Synthesis of (4-arylpyrrolidin-2-ylidene) derivatives of cyclic β-dicarbonyl compounds from cinnamoyl precursors
作者:F. S. Pashkovskii、Yu. S. Dontsu、D. B. Rubinov、F. A. Lakhvich、V. F. Traven’、A. M. Borunov
DOI:10.1134/s1070428014110116
日期:2014.11
1,4-Conjugate Michael addition of nitromethane to the enone fragment of cinnamoyl derivatives of carbo- and heterocyclic beta-dicarbonyl compounds provided the corresponding nitromethyl derivatives. The chemoselective reduction of the nitro group in the latter afforded 4-arylpyrrolidin-2-ylidene derivatives of beta-dicarbonyl compounds in high yield. The reaction products with the heterocyclic beta-dicarbonyl fragment are formed as equilibrium mixture of E- and Z-rotamers in which the E-rotamer predominates.
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