It has been noticed that Figure 5 contains a mistake. Figure 5 a is the same as Figure 5 b. The corrected Figure 5 a is shown below. The editorial office and the authors apologise for this oversight. Kinetic traces for imine formation in a mixture of a) 4+A+E+F (20 mm each, in CD3OD at 25 °C). Error in 1H NMR integration: 5%.