An efficient and general protocol is described for the Michaeladdition of α,β-unsaturated ketones with electron-rich arenes/indoles to give alkylated arenes/indoles under mild reaction condition at room temperature. Shorter reaction time, convenient and good isolated yields are the significant features of this protocol. Moreover, the procedure is environmentally benign in nature and applicable to
A simple, mild, rapid, and highly efficient method for the conjugateaddition of 1H-indoles to electron-deficientolefins has been developed using NaHSO4 ⋅ SiO2 as heterogeneous catalyst. The conversion proceeds at room temperature, and the corresponding Michael adducts are formed in good-to-excellent yields.