neuraminidase, unlike sialic acid and oseltamivir in molecular docking studies. All molecules reduced the viral titer and exhibited non-cytotoxicity along with cryo-protective property towards MDCK cells. Molecules (Z)-2-(3′-Chloro-benzylidene)-1,2-dihydro-indol-3-one (2f), (Z)-2-(4′-Chloro-benzylidene)-1,2-dihydro-indol-3-one (2g) and 2-(2′-Methoxy-phenyl)-1H-quinolin-4-one (3a) were the most interesting
Abstract Lithium tetrafluoroborate has been demonstrated for the first time to be an efficient catalyst in intermolecular aza-Michael addition aromatic amines to electron deficient alkenes. Suitability of the same catalyst in intramolecular aza-Michael addition leading 2-aryl-2,3-dihydroquinolin-4(1H) ones has also been described.
Eco-friendly polyethylene glycol promoted Michael addition reactions of α,β-unsaturated carbonyl compounds
作者:Dalip Kumar、Gautam Patel、Braja G. Mishra、Rajender S. Varma
DOI:10.1016/j.tetlet.2008.09.116
日期:2008.12
Intra- and inter-nucleophilic addition reactions of different α,β-unsaturatedcarbonylcompounds were found to be highly effective without any additives in PEG-400 as a recyclable reaction medium under neutral conditions.
Synthesis of 3-Substituted 2,1-Benzisoxazoles by the Oxidative Cyclization of 2-Aminoacylbenzenes with Oxone
作者:Antonio Arcadi、Marco Chiarini、Luana Del Vecchio、Fabio Marinelli、Leucio Rossi
DOI:10.1055/s-0035-1561471
日期:——
An efficient approach to the synthesis of 2,1-benzisoxazoles through direct construction of the N–O bond by the chemoselective oxidation of 2-aminoacylbenzenes with Oxone is described. This alternative methodology is characterized by its simple and transition-metal-free conditions and good functional group compatibility utilizing Oxone as a green oxidant instead of hypervalent iodine compounds. Moreover
A serendipitous cascade of rhodium vinylcarbenoids with aminochalcones for the synthesis of functionalized quinolines
作者:Kiran Chinthapally、Nicholas P. Massaro、Haylee L. Padgett、Indrajeet Sharma
DOI:10.1039/c7cc07181g
日期:——
A serendipitous five-step cascade of rhodium vinylcarbenoids with aminochalcones enables a unique synthetic approach to highly functionalized tri- and tetra-cyclic quinolines. The cascade reaction begins with the insertion of aminochalcone nitrogen into rhodium vinylcarbenoids followed by intramolecular aldol cyclization to provide a substituted indoline intermediate that undergoes an oxy-Cope rearrangement