A new strategy for the aza-Michael reaction of amides and ureas with α,β-unsaturated enones, which uses p-TsOH·H2O as an efficient and inexpensive catalyst under high-pressure conditions, has been developed.
carbon-containing nucleophiles to cyclicenones. Using this conjugate addition reaction, a variety of different nucleophiles can react with a range of cyclicenones in the presence of p-toluenesulfonic acid under solvent-free ultrasound irradiation conditions affording the corresponding C–N or C–C adducts in good to excellent yields. Comparatively, performing the reaction under ultrasound irradiation gives