A new methodology of annelation of five- and seven-membered heterocycles to quinoxalines

Article abstract of DOI:10.1023/B:RUCB.0000011876.37291.0e

Pyrazolo[3,4-b]-, isoxazolo[4,5-b]-, benzo[2,3]-1,4-diazepino-, and benzo[2,3]-1-4-oxazepinoquinoxalines were prepared by reactions of 2-quinoxalinecarboxaldehyde with 1,2-N,N-, 1,2-N,O and 1,4-N,N- and 1,4-N,O-dinucleophiles.