RxNs

**Scheme 1** Aza-Michael reaction of //p//-anisidine in different solvent systems. **Scheme 2** Michael reaction of indole in different solvent systems.
 * Scheme 3** Reaction between 4-nitrobenzaldehyde and 2-methylindole in different solvent systems and under catalyst-free conditions.


 * Source:** Gu,Y. and Jérôme, F. Glycerol as a Sustainable Solvent for Green Chemistry //Green Chemistry// [Online] **2010**, 12, 1127-1138