72669-49-9Relevant articles and documents
Electrostatic repulsion and hydrogen-bonding interactions in a simple N-aryl-L-valinamide organocatalyst control the stereoselectivity in asymmetric aldol reactions
Tanimura, Yuya,Yasunaga, Kenji,Ishimaru, Kaori
supporting information, p. 6535 - 6539 (2013/11/06)
A novel stereocontrol method for asymmetric aldol reactions of aldehydes with ketones is described. The stereoselectivity of the products is controlled by the electrostatic repulsion and hydrogen-bonding interactions of an N-aryl-L-valinamide catalyst. Th
Chiral calcium catalysts for asymmetric hydroamination/cyclisation
Wixey, James S.,Ward, Benjamin D.
, p. 5449 - 5451 (2011/06/28)
Calcium complexes supported by chiral 1,2-diamines have been shown to be efficient catalysts for the asymmetric hydroamination of amino-olefin substrates; the calcium complexes [Ca(NNR){N(SiMe3) 2}(THF)] (R = tBu, iPr, Ph, 4-C 6H4F) give enantioselectivities of up to 26% which marks a significant increase based upon literature precedence. The structure of [Ca(NNPh){N(SiMe3)2}(py)] has been computed with density functional methods.
Synthesis of an enantiomerically pure resorcinarene with pendant L-valine residues and its attachment to a polysiloxane (Chirasil-Calix)
Ruderisch, Alexander,Pfeiffer, Jens,Schurig, Volker
, p. 2025 - 2030 (2007/10/03)
The synthesis of a new enantiomerically pure resorcinarene by reaction of all resorcinic groups with N-bromoacetyl-L-valine-tert-butyl-amide is described. The chiral macrocyclic product was chemically bonded to a poly(hydro)dimethylsiloxane by hydrosilylation using a platinum catalyst. The resulting chiral polysiloxane Chirasil-Calix can be used as chiral stationary phase (CSP) in capillary gas chromatography.