1.Reactant in regio- and stereoselective morpholine-catalyzed direct C-3 alkenylation with α,β-unsaturated aldehydes. 2.Reactant in selective debenzylation of protective groups using SiliaCat-palladium under mild reaction conditions. 3.Reactant in metal-free Friedel-Crafts alkylation reactions. 4.Reactant in preparation of protein kinase (PKC) inhibitors. 5.Reactant in preparation of indole/quinoline carbothioic acid amide derivatives.