Asymmetric reduction of α,β-unsaturated iminium salts with 1,4-dihydronicotinamide sugar pyranosides
3,3,5-Trimethyl-2-cyclohexylidene iminium salts were reduced with 1,4-dihydronicotinamide sugar pyranosides to give optically active 3,3,5-trimethylcyclohexanone in enantiomeric excess ranging over 3-31percent.The product stereochemistry changed sensitive