A series of 1,3,5-oxadiazin-2-one derivatives were obtained from the intermolecular cyclization of ynamides and nitriles mediated by cheap and readily available molecular iodine under room temperature. This protocol has some distinct advantages of mild conditions, simple work-up, easily available starting materials and fast reaction rate. The structures of all products were characterized by 1 H NMR, 13 C NMR, IR and HRMS.

A series of α-ketoamide derivatives were obtained from the palladium catalyzed oxidation of ynamides using cheap and readily available dimethyl sulfoxide as oxidant and solvent under room temperature. The structures of all products were characterized by 1 H NMR, 13 C NMR, IR and HRMS. This protocol has some distinct advantages of mild conditions, simple work-up, readily available starting materials and fast reaction rate.

A series of 1,2-diaryl acetates were synthesized by one-pot three-component reaction of aromatic aldehydes, benzyl bromide and anhydrides promoted by zinc powder under solvent-free conditions. This protocol has advantages of mild conditions, simple operation, high yields, easily available starting materials and fast reaction rate, which provides a convenient and "green" method for the synthesis of 1,2-diaryl acetates.

A series of novel carbamate compounds were obtained from one pot three component reaction of aldehydes, bromohydrocarbons and isocyanates mediated by zinc powder under room temperature. This protocol has advantages of mild conditions, simple work-up, high yield, easily available starting materials and fast reaction rate. The structures of all products were characterized by 1 H NMR, 13 C NMR, IR, HRMS and elemental analysis.