... European Journal of Organic Chemistry. ... and aldehydes.8 This report has sparked a tremendous renewed interest in the area of asymmetric catalysis by small organic molecules, eg ... 77.0 ppm), ( 1 H δ = 4.2 ppm) or ( 1 H 2.49, 13 C δ = 77.0 ppm) and coupling constants (J) in Hz. ...