Jun Enda

Synthesis of vinylsilanes by palladium-catalyzed reaction of trimethylsilylallyl acetates with nucleophiles

Abstract Treatment of 1-trimethylsilylallyl and 3-trimethylsilylallyl acetates with nucleophiles (active methylene compounds and enamines) in the presence of a catalytic amount of Pd(PPh3)4 affords vinylsilane derivatives selectively.

A novel carbon-carbon bond formation by the Lewis acid catalyzed reaction of β-styrylsilane with acetal

Abstract Treatment of (E)- and (Z)-β-styryltrimethylsilanes with benzaldehyde diethyl acetal in the presence of Lewis acid affords selectively 1,3,5-tri-phenyl-(E,E)- and (E,Z)-1,4-pentadienes, respectively.

A Lewis acid mediated rearrangement of 1-(trimethylsilyl)prop-2-ynyl trimethylsilyl ethers to 2-trimethylsilyl enones

Treatment of 1-(trimethylsilyl)prop-2-ynyl trimethylsily ethers methylaluminium dichloride leads to the formation of the 3-metallated 2-(trimethylsilyl)enones, which, on quenching with water, afford the corresponding 2-(trimethylsilyl)enones in good yields.

A C-phosphono-keten imine as a novel annelation reagent

N-Ethyl(diethylphosphono)methylketen imine, a new type of keten imine, was easily prepared in high yield, and reacted with the sodium salts of salicylaldehyde and 2-formylpyrrole to afford the benzopyran and pyrrolizine derivatives, respectively.