An Experimental−Theoretical Study of the Factors That Affect the Switch between Ruthenium-Catalyzed Dehydrogenative Amide Formation versus Amine Alkylation
作者:Ainara Nova、David Balcells、Nathan D. Schley、Graham E. Dobereiner、Robert H. Crabtree、Odile Eisenstein
DOI:10.1021/om101015u
日期:2010.12.13
either in the coordinationsphere of the metal (path I) or after dissociation from the metal (path II). Path I yields the Ru-bound zwitterionic form of the hemiaminal protonated at nitrogen, which eliminates H2, forming the amide product. In path II, the free hemiaminal dehydrates, giving an imine, which yields the amine product by hydrogenation with the reduced form of the catalyst generated in the initial
Secondary amines are obtained in moderate-good yields by reduction of crude imines prepared from N-alkyltriethoxyiminophosphoranes and aldehydes via the aza-Wittig reaction. N-Alkyltriethoxyiminophosphoranes are synthesized by one-pot azidation of alkyl bromides followed by Staudinger reaction.
Colloidal and Nanosized Catalysts in Organic Synthesis: XX. Continuous Hydrogenation of Imines and Enamines Catalyzed by Nickel Nanoparticles
作者:Yu. V. Popov、V. M. Mokhov、S. E. Latyshova、D. N. Nebykov、A. O. Panov、T. M. Davydova
DOI:10.1134/s1070363218100018
日期:2018.10
Nickel nanoparticles on the BAU-A active carbon or NaX zeolite catalyze hydrogenation of imines and enamines in a flow reactor in a gas phase or in a gas-liquid-solid catalyst system. The process occurs at atmospheric pressure of hydrogen and gives secondary or tertiary amines in a high yield.
Pak; Gartman; Yaganova, Russian Journal of General Chemistry, 1998, vol. 68, # 12, p. 1930 - 1934