Diastereoselective intramolecular cyclization/Povarov reaction cascade for the one-pot synthesis of polycyclic quinolines
作者:E. A. Kuznetsova、A. V. Smolobochkin、T. S. Rizbayeva、A. S. Gazizov、J. K. Voronina、O. A. Lodochnikova、D. P. Gerasimova、A. B. Dobrynin、V. V. Syakaev、D. N. Shurpik、I. I. Stoikov、A. R. Burilov、M. A. Pudovik、O. G. Sinyashin
DOI:10.1039/d2ob01031c
日期:——
method for the synthesis of complex alkaloid-like aza-heterocycles has been developed through the Povarov reaction of in situ generated 2-oxoimidazolium cations. The reaction lead to the formation of 2 C–N, 2 C–C bonds and three stereocentres, and features excellent regio- and diastereoselectivity. Based on the controlled experiments and quantum chemistry data, the mechanism of the reaction cyclization
A versatile way for the synthesis of monomethylamines by reduction of <i>N</i>-substituted carbonylimidazoles with the NaBH<sub>4</sub>/I<sub>2</sub> system
作者:Lin Chen、Xuan Zhou、Zhiyong Chen、Changxu Wang、Shunjie Wang、Hanbing Teng
DOI:10.3762/bjoc.18.104
日期:——
yields from a wide range of raw materials including amines (primaryamines and secondaryamines), carboxylic acids and isocyanates. Besides, an interesting reduction selectivity was observed. Exploration of the reaction process shows that it undergoes a two-step pathway via a formamide intermediate and the reduction of the formamide intermediate to monomethylamine as the rate-determining step. This
PAPADOPOULOS E. P., J. ORG. CHEM. <JOCE-AH>, 1977, 42, NO 24, 3925-3929
作者:PAPADOPOULOS E. P.
DOI:——
日期:——
Promiscuity and Selectivity in Covalent Enzyme Inhibition: A Systematic Study of Electrophilic Fragments
作者:Christian Jöst、Christoph Nitsche、Therese Scholz、Lionel Roux、Christian D. Klein
DOI:10.1021/jm5006918
日期:2014.9.25
building blocks for covalently binding ligands. Six reactive groups with modulated electrophilicity were combined with 11 nonreactive moieties, resulting in a small combinatoriallibrary of 72 fragment-like compounds. These compounds were screened against a group of 11 enzyme targets to assess their selectivity and their potential for promiscuous binding to proteins. The assay results showed a considerably
Synthesis of unsymmetrical biaryl ureas from N-carbamoylimidazoles: kinetics and application
作者:Tristan Rawling、Andrew M. McDonagh、Bruce Tattam、Michael Murray
DOI:10.1016/j.tet.2012.05.002
日期:2012.7
N-Carbamoylimidazoles dissociate in solution to yield imidazole and an isocyanate that may be reacted with another arylamine to form an unsymmetrical biaryl urea. This paper investigates the reaction kinetics and the influence of electron withdrawing/donating substituents on the reaction of N-carbamoylimidazoles with aniline. The overall reactionmechanism involves two zwitterionic intermediates,