874662-43-8Relevant articles and documents
Synthesis and evaluation of new guanidine-thiourea organocatalyst for the nitro-Michael reaction: Theoretical studies on mechanism and enantioselectivity
Shubina, Tatyana E.,Freund, Matthias,Schenker, Sebastian,Clark, Timothy,Tsogoeva, Svetlana B.
, p. 1485 - 1498 (2012/10/29)
A new guanidine-thiourea organocatalyst has been developed and applied as bifunctional organocatalyst in the Michael addition reaction of diethyl malonate to trans-β-nitrostyrene. Extensive DFT calculations, including solvent effects and dispersion correc
Asymmetric organocatalysis with novel chiral thiourea derivatives: Bifunctional catalysts for the Strecker and nitro-Michael reactions
Tsogoeva, Svetlana B.,Yalalov, Denis A.,Hateley, Martin J.,Weckbecker, Christoph,Huthmacher, Klaus
, p. 4995 - 5000 (2007/10/03)
Novel bifunctional organocatalysts bearing both a thiourea moiety and an imidazole group on a chiral scaffold were synthesized and applied to the Strecker synthesis and nitro-Michael reaction. The addition of acetone to nitroolefins in the presence of these novel bifunctional organocatalysts gave enantioselectivities (up to 87 % ee) that are superior to those generated by the proline and/or homo-proline tetrazole catalysts described in the literature. Wiley-VCH Verlag GmbH & Co. KGaA, 2005.