ChemInform Abstract: A Practical Route to Pyrazines and Quinoxalines, and an Unusual Synthesis of Benzimidazoles.

Abstract

Ring closure reactions O 0130 A Practical Route to Pyrazines and Quinoxalines, and an Unusual Synthesis of Benzimidazoles. -A flexible approach to benzimidazoles, quinoxalines and pyrazines, cf. compounds (VI), (VIII), (IX) and (XI) uses masked keto-aldehydes, e.g. (IV), which are prepared by using xanthate transfer technology. -(MOUGIN, C.; SANCON, J.; ZARD*, S. Z.; Heterocycles 74 (2007) 1, 211-218; Dep. Chem., DCMR, Ec. Polytech., F-91128 Palaiseau, Fr.; Eng.) -K. Schneider 25-032