The IPB has once again been recognized for its exemplary actions in terms of equal opportunity-oriented personnel and organizational policies and has received the TOTAL E-QUALITY certification for the…
The Plant Science Student Conference (PSSC) has been organised by students from the two Leibniz institutes, IPK and IPB, every year for the last 20 years. In this interview, Christina Wäsch (IPK) and…
Braga, A. L.; Silveira, C. C.; de Bolster, M. W. G.; Schrekker, H. S.; Wessjohann, L. A.; Schneider, P. H.;Microwave-accelerated asymmetric allylations using cysteine derived oxazolidine and thiazolidine palladium complexesJ. Mol. Catal. A239235-238(2005)DOI: 10.1016/j.molcata.2005.06.008
A set of enantiopure oxazolidine–thioether and thiazolidine–alcohol palladium complexes catalyze the microwave-mediated enantioselective allylation of rac-1,3-diphenyl-2-propenyl acetate with dimethyl malonate. Good yields and ee's were achieved in reaction times of 2 min instead of hours with conventional heating.
Publications
Braga, A. L.; Lüdtke, D. S.; Wessjohann, L. A.; Paixão, M. W.; Schneider, P. H.;A chiral disulfide derived from (R)-cysteine in the enantioselective addition of diethylzinc to aldehydes: loading effect and asymmetric amplificationJ. Mol. Catal. A22947-50(2005)DOI: 10.1016/j.molcata.2004.11.004
A chiral disulfide derived from (R)-cysteine is described to catalyze the enantioselective addition of diethylzinc to benzaldehyde with high enantioselectivities at different catalyst loadings. Nonlinear effects have also been evaluated and the relationship between the ee of the catalyst and the ee of the product has been found to be strictly linear.