Highly Regioselective Route to Substituted Imidazo[1,2-a]quinoxalines
作者:Balendu Singh、Anand Acharya、Hiriyakkanavar Ila
DOI:10.2174/1570178615666180108154309
日期:2018.4.12
A new synthesis of unsymmetrically substituted imidazo[1,2-a]quinoxalines via regioselective displacement of 3-chloro group in 2-(methylthio)-3-chloroquinoxalines by aminoacetaldehyde dimethylacetal and subsequent-acid mediated intramolecular cyclization of the resulting adducts is reported in this study. The utility of the 3-(methylthio) group in these imidazoquinoxalines is also demonstrated by conversion
Heteroannulation of Nitroketene <i>N,S</i>-Arylaminoacetals with POCl<sub>3</sub>: A Novel Highly Regioselective Synthesis of Unsymmetrical 2,3-Substituted Quinoxalines
作者:C. Venkatesh、B. Singh、P. K. Mahata、H. Ila、H. Junjappa
DOI:10.1021/ol0505095
日期:2005.5.1
A novel regioselective route for the synthesis of substituted and fused 3-chloro-2-(methylthio)quinoxalines through POCl3-mediated heteroannulation of a range of alpha-nitroketene N,S-anilinoacetals has been reported.