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.
Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Plant Resources Arid Area, Key Lab Chem Plant Resources, Urumqi 830011, Peoples R China
Hou Xueling,Hemit Helimay,Yong Jianping,et al. Mild and Efficient Procedure for Michael Addition of N-Heterocycles to alpha,beta-Unsaturated Compounds Using Anhydrous K3PO4 as Catalyst[J]. SYNTHETIC COMMUNICATIONS,2010,40(7):973-979.