Asymmetric Homogeneous Hydrogenation of 2-Pyridones
摘要:
An asymmetric homogeneous hydrogenation of 2(1H)-pyridones has been developed, using a ruthenium complex bearing two chiral N-heterocyclic carbene (NHC) ligands. To the best of our knowledge, the presented reaction is the first example of a homogeneous asymmetric conversion of 2-pyridones into the corresponding enantioenriched 2-piperidones.
Regioselective synthesis of piperidinones by metal-catalyzed ring expansion-carbonylation reactions. Remarkable cobalt and/or ruthenium carbonyl catalyzed rearrangement and cyclization reactions
作者:Ming De Wang、Howard Alper
DOI:10.1021/ja00044a010
日期:1992.8
Carbonylation of pyrrolidines, catalyzed by cobaltcarbonyl, results in the formation of piperidinones. The reaction is regiospecific in most cases, and the yield of product is increased when rutheniumcarbonyl is present as a second catalyst. The dual catalytic system [Co 2 (CO) 8 /Ru 3 (CO) 12 ] is useful for the novel rearrangement of heterocyclic nitrogen ketones ((CH 2 ) n NCH 2 COR, n=4-7] to
Iron-Catalyzed Regioselective Direct Arylation at the C-3 Position of <i>N</i>-Alkyl-2-pyridone
作者:Atanu Modak、Sujoy Rana、Debabrata Maiti
DOI:10.1021/jo502362k
日期:2015.1.2
A number of pharmaceutical compounds possess an arylated 2-pyridone moiety. The existing reports using expensive starting materials and/or superstoichiometric metal salts have prompted us to explore a possible user-friendly method for their synthesis. In this report, we demonstrate an easy-to-handle reaction condition with an iron catalyst for the exclusive generation of C-3-arylated pyridone via C–H