Graphical Abstract: Eur. J. Org. Chem. 4/2011

The cover picture shows how the evaporation of bioactive volatile compounds, such as benzaldehyde, can efficiently be slowed down to increase the length of time that the scent can be perceived. Bioactive volatiles serve in nature as signalling compounds for communication between species such as between a flower and a butterfly. Because of their pleasant smell to humans, the same compounds are used as flavours and fragrances in our everyday life. Dynamic mixtures obtained by reversible reaction of diamines with volatile aldehydes to form aminals were identified as an efficient way to prolong the perception of bioactive aldehydes in functional perfumery. In their article on p. 681 ff, A. Herrmann et al. show that the “butterfly‐shaped“ aminal of N,N′ ‐dibenzylcyclohexyl‐1,2‐diamine and benzaldehyde is highly effective in controlling the release of a mixture of volatile aldehydes and ketones.