A convenient synthesis of (z)-3-(α-alkoxycarbonyl-α-cyanomethylene)-2-oxo-1,2,3,4-tetrahydroquinoxalines and related compounds
作者:Yoichi Yamada、Heinosuke Yasuda
DOI:10.1002/jhet.5570350628
日期:1998.11
(Z)-3-(α-Alkoxycarbonyl-α-cyanomethylene)-2-oxo-1,2,3,4-tetrahydroquinoxalines 3 and (Z)-3-(α-alkoxycarbonyl-α-cyanomethylene)-3,4-dihydrobenzo[g]quinoxalin-2(1H)-ones 5 possessing various alkoxycarbonyl groups were prepared in good yields directly from the reaction of dialkyl (E)-2,3-dicyanobutendioates 1 with o-phenylenediamine (2) or with 2,3-diaminonaphthalene (4), respectively. Furthermore, 2
(Z)-3-(α-烷氧羰基-α-氰基亚甲基)-2-氧-1,2,3,4-四氢喹喔啉3和(Z)-3-(α-烷氧羰基-α-氰基亚甲基)-3,4直接由二烷基(E)-2,3-二氰基丁二酸酯1与邻苯二胺(2)或2的反应以高收率制备具有各种烷氧羰基的-dihydrobenzo [ g ] quinoxalin-2(1 H)-ones 5分别为,3-二氨基萘(4)。此外,使2,3-二氨基吡啶(6)和3,4-二氨基吡啶(7)与二乙酯1b反应。得到(Z)-2-(α-氰基-α-乙氧基羰基亚甲基)-1,2-二氢-4 H-吡啶并[2,3 - b ]吡嗪-3-一(8)和(Z)-3- (α-氰基-α-乙氧基羰基亚甲基)-3,4-二氢-1 H-吡啶并[3,4- b ]吡嗪-2-酮(9)。的结构研究3,5,8,和9通过在一些细节NMR实验进行。