Synthesis and anti-neuroinflammatory activity studies of substituted 3,4-dihydroquinoxalin-2-amine derivatives
作者:Donthabhakthuni Shobha、Murugulla Adharvana Chari、Khagga Mukkanti、Sun Yeou Kim
DOI:10.1016/j.tetlet.2012.03.057
日期:2012.5
We demonstrate the synthesis of multifunctional 3,4-dihydroquinoxalin-2-amine derivatives 4 through a three-component condensation reactions of a substituted o-phenylenediamines 1 (OPDA), diverse ketones 2 and various isocyanides 3 in the presence of a catalytic amount of p-toluenesulfonic acid (PTSA) affording excellent yields (82–96%) and 10 mol % of silica gel supported sulfuric acid with good yields
Visible-Light-Mediated Synthesis of 4H-benzo[1,4]thiazin-2-amines and 3,4-Dihydroquinoxalin-2-amines: An Efficient and Metal Free Route to C–S, C–N Bond Formation
作者:Neetu Yadav、Hozeyfa Sagir、Mohd. Danish Ansari、I. R. Siddiqui
DOI:10.1007/s10562-018-2388-2
日期:2018.6
and practical synthesis of benzothiazine by visible-light-mediated free radical reaction has been developed. This protocol provides a new, facile, eco-friendly strategy to construct benzothiazine and quinoxaline derivatives via formation of C–S and C–N bonds under metal-free condition. This synthesis has been performed under visible light illumination in aqueous ethanol at roomtemperature using aromatic
Amberlyst-15: an efficient and reusable catalyst for multi-component synthesis of 3,4-dihydroquinoxalin-2-amine derivatives at room temperature
作者:Murugulla Adharvana Chari
DOI:10.1016/j.tetlet.2011.09.015
日期:2011.11
We demonstrate on the synthesis of multifunctional 3,4-dihydroquinoxalin-2-amine derivatives through a three-component condensation of substituted o-phenylenediamines (OPDA), diverse ketones, and various isocyanides in the presence of an efficient and reusable amberlyst-15 catalyst which was found to be highly active and afforded excellent yields (85–99%) in ethanol at room temperature (2–3 h).
Here we demonstrate on the synthesis of multifunctional 3,4-dihydroquinoxalin-2-amine derivatives through a three-component condensation of substituted o-phenylenediamines (OPDA), diverse ketones, and various isocyanides in the presence of AlKIT-5 catalyst which was found to be highly active and selective, affording excellent yields (85-98%) in ethanol at room temperature (2-4 h).