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