Abstract
This thesis describes developments of new organic transformations using gold catalysis. First chapter deals with gold catalyzed synthesis of quinolines from hydroxylamines using selectfluor as an oxidant. The reaction have broad substrate scope under mild reaction conditions. Second chapter deals with gold-catalyzed formal hetero-[4+2] cycloadditions of tert-butyl propiolates with carbonyl compounds, which proceeded efficiently to yield 1,3-dioxin-4-one derivatives over a wide scope of substrates. With acetone as a promoter, gold-catalyzed cycloadditions of these propiolate derivatives with enol ethers led to the formation of atypical [4+2]-cycloadducts with skeletal rearrangement.