Synthesis of Schiff Bases in Aqueous Media

The paper <https://www.hindawi.com/journals/jchem/2013/909217/> describes a possibility to synthesize salicylaldehyde-based Schiff Bases using water as a solvent. Yields shown for the microwave-assisted procedure are high, exceeding 90%, though the procedure requires no water removal, Dean-Stark equipment etc. 


Is it the exception that proves the rule or the Schiff bases synthesis, in general, is always possible in aqueous media? Or maybe the microwave does the magic?


