Bum Tae Kim

An efficient Julia olefination mediated by magnesium in ethanol

Abstract Reductive elimination step of Julia olefination was conveniently achieved by using magnesium powder in absolute ethanol in the presence of catalytic amount of mercuric chloride at room temperature to give the corresponding alkenes in almost quantitatively yields.

Synthesis of 2-fluoroabscisic acid: A potential photo-stable abscisic acid

Abstract Novel fluorinated abscisic acid (ABA) analogs were synthesized by introducing fluorine through the Wittig reaction of α-ionone derivatives with triethyl phosphono-2-fluoroacetate. Molecular orbital calculations showed that the introduction of fluorine at the 2 position stabilized the configuration of the side chain.

Efficient synthesis of novel α-aryl(alkyl)-β, β-difluorovinyl and α-aryl(alkyl)-β-fluoro-β-perfluoroalkylvinyl sulfides

Reaction of 1,1-vis(phenylthio)perfluoroalkyl aromatics or alkanes with a mixture of 2 equiv. of TiCl4 and 4 equiv. of LiAlH4 in THF at reflux temperature for 3 hours afforded α-aryl(alkyl)-β-fluoro-β-perfluoroalkylvinyl and α-aryl (alkyl)-β-fluoro-β-perfluoroalkylvinyl sulfides in good yields.