Aqueous Hydrofluoric Acid Catalyzed Facile Synthesis of 2,3,6-Substituted Quinoxalines
作者:A. Chandra Shekhar、A. Ravi Kumar、G. Sathaiah、K. Raju、P. V. S. S. Srinivas、P. Shanthan Rao、B. Narsaiah
DOI:10.1002/jhet.1753
日期:2014.9
A versatile synthetic route for the preparation of 2,3,6‐trisubstituted quinoxalines in excellent yield is developed from θ‐diamines and 1,2‐dicarbonyl compounds in which aqueoushydrofluoricacid was employed as the medium and catalyst. Other salient features of this protocol include milder conditions, absence of coupling agents, and easy workup procedures.
An efficient method for the synthesis of quinoxaline derivatives catalyzed by titanium silicate-1
作者:Pranav S. Chandrachood、Amol R. Jadhav、Dinesh R. Garud、Nirmala R. Deshpande、Vedavati G. Puranik、Rajashree V. Kashalkar
DOI:10.1007/s11164-020-04258-w
日期:2020.12
A series of quinoxaline derivatives were efficiently synthesized by convenient and simple procedure in excellent yields using 1 wt.% of titanium silicate (TS-1) catalyzed reaction of 1,2-diamines and 1,2-diketones in methanol at room temperature. This reaction is scalable to multigram scale and the catalyst is recyclable.