Abstract
The cover picture shows a Morita–Baylis–Hillman reaction between cyclic enones and aldehydes, catalyzed by a bicyclic imidazolyl alcohol and performed in water, the most eco-friendly solvent. The new bifunctional catalyst presents in its structure two key active centers: one acting as a Lewis base in association with a second one acting as a Brønsted acid. This synergic association seems to stabilize the zwitterionic species involved in the catalytic cycle of this synthetically useful chemical transformation. The new protocol avoids the use of phosphanes and has sustainable features. Details are discussed in the article by F. Coelho et al. on p. 6861 ff.
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