A process for preparing 3-substituted 3,4-dihydroquinoxalin-2(1H)-ones is proposed. It is based on the reaction of o-phenylenediamine with amides, di- and mono-esters of maleic acid as well as (E)-3-(5-phenyl-1,3,4-oxadiazol-2-yl)acrylic acid in the presence of N,N′-carbonyl-diimidazole.
提出了一种制备 3-取代 3,4-二氢
喹喔啉-2(1H)-酮的工艺。它基于
邻苯二胺与
马来酸的酰胺、二酯和单酯以及(E)-3-(5-苯基-1,3,4-恶二唑-2-基)
丙烯酸在 N,N′-羰基二
咪唑存在下的反应。