%0 Journal Article %T Synthesis and evaluation of new guanidine-thiourea organocatalyst for the nitro-Michael reaction: Theoretical studies on mechanism and enantioselectivity %A Tatyana E. Shubina %A Matthias Freund %A Sebastian Schenker %A Timothy Clark %J Beilstein Journal of Organic Chemistry %D 2012 %I %R 10.3762/bjoc.8.168 %X A new guanidine-thiourea organocatalyst has been developed and applied as bifunctional organocatalyst in the Michael addition reaction of diethyl malonate to trans-¦Â-nitrostyrene. Extensive DFT calculations, including solvent effects and dispersion corrections, as well as ab initio calculations provide a plausible description of the reaction mechanism. %K bifunctional organocatalyst %K DFT calculations %K guanidine-thiourea %K Michael addition %K organocatalysis %K transition states %U http://dx.doi.org/10.3762/bjoc.8.168