Abstract A straightforward procedure is presented for the covalentimmobilization of ester and silyl ether derivatives of theCinchona alkaloid 10, 11-dihydroquinidine within insoluble cross- linked silicone elastomeric films. These materials were effective heterogeneous organocatalysts in the asymmetric dimerization of ketenes, which provided chiral Weinreb β- ketoamides in 28–83% yield and 79–99% ee in the course of several recycles. A ...
