Abstract
Abstract Organometallics plays an essential role on organic synthesis in these decades. It was applied in coupling reactions, cyclization reactions or ring opening reactions. Organometallics catalyzed reactions not only have good regioselectivities but have good stereoselectivities. In natural products synthesis, it is very important to control stereo or regio direction in specific positions. We emphasize on ruthenium and zinc metal complex which apply in ethynyl alcohol catalyzed transfer reactions. First, ruthenium complex was applied on transformation of propargyl ether into 1,3-dienes and benzaldehyde via transfer hydrogen. Second, ruthenium complex was apply on cleavage of a carbon-carbon triple bond: efficient transformation of propargyl alcohols into alkenes and carbon monoxide. Last, we used zinc complex on cyclization from propargyl alcohols. These reactions worked on mild conditions and used less catalyst (5 %) without any other chemical reagents to complete the reactions. These new reactions chemistry is Green Chemistry. Liquid crystal display (LCD) was developed full of vitality during decades. Because of the O-type polarizer, one drawback of the LCD is the narrow of the view angel. Although compensation film can improve the view angle, it critically reduces the backlight and increases the cost. We synthesis disk molecules to apply in E-type polarizer. E-type polarizer not only can increase the view angel, but also reduce the cost.