Additive-Free Nickel-Catalyzed Debenzylation Reactions via Hydrogenative C-O and C-N Bond Cleavage was written by Lange, Saskia;Formenti, Dario;Lund, Henrik;Kreyenschulte, Carsten;Agostini, Giovanni;Bartling, Stephan;Bachmann, Stephan;Scalone, Michelangelo;Junge, Kathrin;Beller, Matthias. And the article was included in ACS Sustainable Chemistry & Engineering in 2019.Recommanded Product: Pyridin-4-ol This article mentions the following:
C-O and C-N cleavage reactions play a fundamental role in synthetic chem. and biomass valorization. Many efforts have been done in the past in order to develop efficient catalysts able to mediate these transformations. However, still some drawbacks are present: necessity for additives and occurrence of side reactions. Here, an array of Ni-based catalysts derived from the thermal decomposition of a Ni(II)/phenanthroline complex onto different supports was prepared Ni-N-C@Al2O3-1000 material (pyrolyzed at 1000 鎺矯) was the most efficient catalyst for both O- and N-debenzylation of various substrates ( > 20 examples) using dihydrogen as reductant. Advantageously, this process is water tolerant, proceeds free of any additive, and does not show overhydrogenation of the arene ring. The structure, morphol., and chem. composition of Ni-N-C@Al2O3-1000 have been elucidated. It is constituted by variously sized Al2O3-supported Ni(0)/NiOx nanoparticles (NPs) embedded by layers of nitrogen-doped carbon. Ni-based heterogeneous catalysts derived from the thermal decomposition of a defined complex exhibited remarkable activity and selectivity in the cleavage of C-O and C-N bonds. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2Recommanded Product: Pyridin-4-ol).
Pyridin-4-ol (cas: 626-64-2) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of 閳?8.7 鑴?10閳? cm3璺痬ol閳?.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ璺痬ol閳? in the liquid phase and 140.4 kJ璺痬ol閳? in the gas phase. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals.Recommanded Product: Pyridin-4-ol