6319-19-3Relevant articles and documents
SuperQuat 5,5-dimethyl-4-iso-propyloxazolidin-2-one as a mimic of Evans 4-tert-butyloxazolidin-2-one
Bull, Steven D.,Davies, Stephen G.,Garner, A. Christopher,Kruchinin, Dennis,Key, Min-Suk,Roberts, Paul M.,Savory, Edward D.,Smith, Andrew D.,Thomson, James E.
, p. 2945 - 2964 (2008/02/09)
The incorporation of a gem-dimethyl group at the 5-position of a chiral oxazolidinone biases the conformation of the adjacent C(4)-stereodirecting group such that the gem-dimethyl-4-iso-propyl combination mimics a C(4)-tert-butyl group, providing higher levels of stereocontrol than a simple 4-iso-propyloxazolidinone. The generality of this principle is demonstrated with applications in stereoselective enolate alkylations, kinetic resolutions, Diels-Alder cycloadditions and Pd-catalysed asymmetric acetalisation reactions. The Royal Society of Chemistry 2006.
Enzymatic kinetic resolution of aromatic substituted norbornene mono-esters using pig's liver esterase
Mamaghani
, p. 147 - 151 (2007/10/03)
Pig's liver esterase (PLE) has been used as a chiral catalyst in the enzymatic kinetic resolution of aromatic substituted norbornene mono-esters, methyl 3-endo-phenylbicyclo[2.2.1]hept-5-ene-2-exo-carboxylate and its endo-counterpart, methyl 3-endo-p-nitro-phenyl-bicyclo[2.2.1]hept-5-ene-2-exo-carboxylate and methyl 3-endo-benzoylbicyclo[2.2.1]hept-5-ene-2-exo-carboxylate. In this study a range of low to high enantioselectivities (83% ee) was observed. The effect of co-solvents has also been examined.
Saccharomyces cerevisiae in the catalysis of cycloaddition reactions
Rao, K Rama,Bhanumathi, N,Nageswar, Y V D,Srinivasan, T N
, p. 937 - 938 (2007/10/02)
A brief review of the preliminary results of the biocatalytic cycloaddition reaction of cyclopentadiene 1, vinylpyridine 9 and pyridazinone 12 with various dienophiles in the presence of Saccharomyces cerevisiae is presented.