52818-63-0Relevant articles and documents
SYNTHESIS, STRUCTURE, AND PROPERTIES OF 1-(p-R-PHENACYL)-2-(p-METHOXYBENZYLAMINO)PYRIDINIUM BROMIDES
Demchenko, A. M.,Chumakov, V. A.,Nazarenko, K. G.,Krasovskii, A. N.,Pirozhenko, V. V.,Lozinskii, M. O.
, p. 567 - 572 (1995)
We have synthesized 2-(p-methoxybenzylamino)-1-(p-R-phenacyl)pyridinium bromides by alkylation of 2-(p-methoxybenzylamino)pyridine with substituted phenacyl bromides.Using spectral methods we have shown that the title compounds exist in the form of 1,2-diaryl-2-hydroxy-2,3-dihydroimidazopyridinium salts.We have studied their properties and suggest an alternative synthesis route.
[(PPh3)2NiCl2]-Catalyzed C-N bond formation reaction via borrowing hydrogen strategy: Access to diverse secondary amines and quinolines
Donthireddy,Pandey, Vipin K.,Rit, Arnab
, p. 6994 - 7001 (2021/06/09)
Commercially available [(PPh3)2NiCl2] was found to be an efficient catalyst for the mono-N-alkylation of (hetero)- A romatic amines, employing alcohols to deliver diverse secondary amines, including the drug intermediates chloropyramine (5b) and mepyramine (5c), in excellent yields (up to 97%) via the borrowing hydrogen strategy. This method shows a superior activity (TON up to 10000) with a broad substrate scope at a low catalyst loading of 1 mol % and a short reaction time. Further, this strategy is also successful in accessing various quinoline derivatives following the acceptorless dehydrogenation pathway.
Convenient and Reusable Manganese-Based Nanocatalyst for Amination of Alcohols
Subaramanian, Murugan,Ramar, Palmurukan M.,Sivakumar, Ganesan,Kadam, Ravishankar G.,Petr, Martin,Zboril, Radek,Gawande, Manoj B.,Balaraman, Ekambaram
, p. 4334 - 4341 (2021/08/25)
The development of new sustainable nanocatalytic systems for green chemical synthesis is a growing area in chemical science. Herein, a reusable heterogeneous N-doped graphene-based manganese nanocatalyst (Mn@NrGO) for selective N-alkylation of amines with alcohols is described. Mechanistic studies illustrate that the catalytic reaction follows a domino dehydrogenation-condensation-hydrogenation sequence of alcohols and amines with the formation of water as the sole by-product. The scope of the reaction is extended to the synthesis of pharmaceutically important N-alkylated amine intermediates. The heterogeneous nature of the catalyst made it easy to separate for long-term performance, and the recycling study revealed that the catalyst was robust and retained its activity after several recycling experiments.