Synthesis of 6,7-ethylenedioxyquinoxalines and pyrido[2,3-b]pyrazines as intermediates in the preparation of antineoplastic agents
作者:M Mateu、A.S Capilla、Y Harrak、M.D Pujol
DOI:10.1016/s0040-4020(02)00500-8
日期:2002.6
A convenient procedure for the synthesis of quinoxalines and pyridopyrazines has been developed from aryldiamines. The condensation of aminocarbamates such as 12 with ethyl 2,3-dibromopropionate provide the quinoxaline 14 directly, in a one-step operation. The methodology reported herein represents an alternative to condensation of o-phenylenediamines with α-dicarbonyl compounds for the quinoxalines
已经从芳基二胺开发了一种方便的合成喹喔啉和吡啶并吡嗪的方法。氨基甲酸酯如12与2,3-二溴丙酸乙酯的缩合以一步法直接提供喹喔啉14。本文报道的方法代表了邻苯二胺与α-二羰基化合物缩合以形成喹喔啉的替代方法。将相同的步骤应用于2,3-二氨基吡啶以获得相应的吡啶并吡嗪。