indoloquinoxalines obtained by condensation of isatin with an unsymmetrical benzene-1,2-diamine, regioselective syntheses of the 1-, 2-, 3-, and 4-aminoindolo[2,3-b]quinoxalines have been developed. With the four derivatives in hand, isomers obtained by direct cyclocondensations starting from amino or nitro substituted benzene-1,2-diamines could be unambiguously identified. The results of these studies show
Fabrication and photophysical assessment of quinoxaline based chemosensor: Selective determination of picric acid in hydrogel and aqueous medium
作者:Debolina Ghosh、Megha Basak、Deepmoni Deka、Gopal Das
DOI:10.1016/j.molliq.2022.119816
日期:2022.10
health and the environment. In this regard, an electron-rich amino incorporated quinoxaline probe (L1) was synthesized, which unveiled a highly discriminative fluorescence turn-off response towards picricacid (PA) with a 5.21 ppm detection limit (KSV ~20.87 × 106 M−1). Detailed spectroscopic and DFT studies validated that PET from electron-rich L1 to electron-deficient PA was responsible for fluorescence
Sulfamic Acid: A Mild, Efficient, and Cost-Effective Catalyst for Synthesis of Indoloquinoxalines at Ambient Temperature
作者:Pravin G. Hegade、Mansing M. Mane、Jayavant D. Patil、Dattaprasad M. Pore
DOI:10.1080/00397911.2014.943345
日期:2014.12.2
A simple, cost-effective method for synthesis of indoloquinoxalines from isatin and o-phenylenediamine employing a catalytic amount of sulfamic acid at ambient temperature is reported. Moreover, the method is applicable for a variety of isatins, ninhydrin, 4-hydroxynaphthaquinone, and 1,2-diketones. The key features of the protocol include rapid reactions with good yields, simple workup procedure, and easy isolation of products.
DRULYASH, A. G.;IVASHCHENKO, A. V.;TITOV, V. V., XIMIYA GETEROTSIKL. SOEDIN., 1984, N 11, 1544-1548
作者:DRULYASH, A. G.、IVASHCHENKO, A. V.、TITOV, V. V.
DOI:——
日期:——
Reaction of aromatic o-diamines with isatins. 3. 4-nitro- and 4,5-dinitro-o-phenylenediamines