The completely solventfree as well as catalystfree aza‐Michael addition reaction of azoles to liquid Michael acceptors is studied. As long as the solubility of the azole in the reaction mixture is sufficient, the addition reaction proceeds towards completion in several hours at 80 °C as has been demonstrated with 12 examples.
Mild and Efficient Procedure for Michael Addition of N-Heterocycles to <font>α</font>,<font>β</font>-Unsaturated Compounds Using Anhydrous K<sub>3</sub>PO<sub>4</sub> as Catalyst
Imidazole, 1,2,4-triazole, indole, and benzotriazole undergo conjugate additions with , -unsaturated carbonyl compounds in the presence of anhydrous potassium phosphate at ambient temperature to afford the corresponding Michael adducts in excellent yields.