Fig. 6: Product derivatization.

a Derivatization of 20b. b Derivatization of 21c. Product ratios were determined by 1H NMR analysis of crude reaction mixtures. See Supplementary Information for experimental details. L* = (R,R)-( − )-N,N’-Bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediamine. ox oxalate.