77924-19-7Relevant academic research and scientific papers
Metal-assisted Reactions: Part 19. Burst Kinetics in Heterogeneous Catalytic Transfer Hydrogenolysis
Johnstone, Robert A. W.,Price, Peter J.
, p. 1069 - 1076 (2007/10/02)
Arene formation by catalytic transfer hydrogenolysis of aryloxytetrazolyl ethers in the liquid-phase shows biphasic concentration-time curves which indicate rate-limiting dissociation of heterogeneous complexes between catalyst and one of the reaction products, a tetrazolone.A dependence of catalytic reaction rate on pH and following modifications made to the catalyst are reported also.
METAL-ASSISTED REACTIONS-13. RAPID, SELECTIVE REDUCTIVE CLEAVAGE OF PHENOLIC HYDROXYL GROUPS BY CATALYTIC TRANSFER METHODS
Hussey, Brendan J.,Johnstone, A. W.,Entwistle, Ian D.
, p. 3775 - 3781 (2007/10/02)
Previous work has shown that, after converting phenols into suitable phenolic ethers, the aromatic C-O bond of the original phenol can be reductively cleaved heterogeneously to give a C-H bond through the use of molecular hydrogen or hydrogen donors together with a transition metal catalyst.The present work provides a method for selectively replacing a phenolic OH group by H in just a few minutes, compared with the 2 to 4 hr required previously using a hydrogen donor and the several hours under pressure required for molecular hydrogen.Various kinds of groups are suitable for preparing the required phenolic ethers from phenols, but the best ones are strongly electronwithdrawing heteroaromatic entities.Solvent appears to play an important role in this heterogeneous reaction, the mechanism of which is discussed.
