S 98 Synthesis of [2,3-b]thieno- and furoquinoxalines by the S-N(H) and S-N(ipso) reactions of 2-substituted quinoxalines with acetophenones [Electronic resource] / A. Yu. Ponomareva, D. G. Beresnev, N. A. Itsikson, O. N. Chupakhin, G. L. Rusinov // Mendeleev Communications. - 2006. - Vol. 16, № 1. - P16-18 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The treatment of quinoxalin-2-one with acetophenones in the presence of boron trifluoride gives 3-(2-hydroxy-2-R-vinyl)-quinoxalin-2-ones, which can be transformed into [2,3-b]thienoquinoxalines by reactions with P2S5. \\\\Expert2\\nbo\\Mendeleev Communications\\2006, v.1, p.16.pdf |