Minute synthesis of electrophilic alkenes under microwave irradiation

Article abstract of DOI:10.1055/s-1994-25453

Condensation of carbonyl derivatives 2 with active methylene compounds 1 is efficiently achieved, within 3 to 15 minutes under microwave irradiation by a solvent free reaction in the presence of carefully adjusted amounts of piperidine leading to Knocvenagel products 3 in good to excellent yields.