Akira Sekiya

The cross-coupling of aryl halides with grignard reagents catalyzed by iodo(phenyl)bis(triphenylphosphine)palladium(II)

Abstract The palladium-catalyzed cross-coupling of aryl halides with Grignard reagents affords a variety of biaryls and alkylbenzenes. Based on the proposed catalytic cycle, the complex (PPh 3 ) 2 Pd(Ph)I was found to be a convenient and general catalyst. Certain features of cross-coupling with this catalyst are described.

Palladium metal-catalyzed cross-coupling of aryl iodides with arylmagnesium bromides. Synthesis of fluorobiphenyls

Abstract Palladium metal functions as catalyst in the coupling of iodobenzene with phenylmagnesium bromide. For practical purposes, palladium(II) chloride was used instead, since it is converted to palladium metal during the course of the reaction. A high catalytic effect of palladium(II) chloride at low concentrations (saturated solutions in tetrahydrofuran,

Friction Properties of Fluorinated Compounds

The friction properties of synthetic fluorinated compounds such as n-C7F15-CH2OH, n-C7F15CH(OH)2, n-C7F15CH2NH2 and n-C7F15COOH, were investigated with a pendulum type friction tester in the steel/steel and steel/aluminum sliding friction systems. These fluorinated compounds gave different friction properties in the two systems. It is considered that this fact is due to the different chemical interaction of the fluorinated compounds with steel or aluminum surfaces.