Catalytic hydrogenation of disubstituted benzenes and configurational isomerization of corresponding cyclohexanes

Autor: Freidlin, L. Kh., Litvin, E. F., Yakubenok, V. V., Pivonenkova, L. P.
Zdroj: Russian Chemical Bulletin; April 1973, Vol. 22 Issue: 4 p823-825, 3p
Abstrakt: 1.The initial hydrogenation rate of the methyl- and ethylanilines on Ru-C catalyst is independent of the concentration of the hydrogenated compound and increases linearly with increase in the hydrogen pressure in the range 20–80 atm.2.The hydrogenation rate of the isomeric toluidines in ethanol on Ru-C and Rh-C catalysts decreases in the order: p=o>m. The reaction is accelerated when acids are added and is retarded in alkaline solutions.3.The cis-isomer of the alkylcyclohexylamine is formed predominantly on both Ru-C and Rh-C catalysts. The ratio of the cis-trans isomers (during hydrogenation on Ru-C) is independent of the pressure (20–120 atm) and the temperature (42–93°).
Databáze: Supplemental Index