ChemInform Abstract: Metal-Assisted Reactions. Part 19. Burst Kinetics in Heterogeneous Catalytic Transfer Hydrogenolysis.
Abstract
Arene (II) formation by catalytic transfer hydrogenolysis of aryloxytetrazolyl ethers (I) in the liquid phase using NaH2PO2-H2O as H donor shows biphasic concentration-time curves which indicate rate-limiting dissociation of heterogeneous complexes between catalyst and one of the reaction products, a tetrazolone (given in the scheme as its tautomer (III)).
ChemInform Abstract
Arene (II) formation by catalytic transfer hydrogenolysis of aryloxytetrazolyl ethers (I) in the liquid phase using NaH2PO2-H2O as H donor shows biphasic concentration-time curves which indicate rate-limiting dissociation of heterogeneous complexes between catalyst and one of the reaction products, a tetrazolone (given in the scheme as its tautomer (III)). A dependence of the catalytic reaction rate on pH and the hydrogenolysis of some modified ethers (IV) and (V) are also reported. In the case of (Ia) (R1: -O-Me) the effect of the catalyst modified with Pb is studied as well. The synthesis of all starting ethers (I), (IV), and (V), and of some preceding compounds is described.
