Novel dicyanomethylene compounds from the reaction of 2-aryl-2,3-dihydro-1H-pyrrolo[3,4-b] quinoxalines with ethenetetracarbonitrile

被引:4
作者
Hassan, Alaa A. [1 ]
El-Shaieb, Kamal M.
Doepp, Dietrich
机构
[1] Menia Univ, Fac Sci, Dept Chem, El Minia, Egypt
[2] Univ Duisburg Gesamthsch, D-47048 Duisburg, Germany
关键词
azaisoindoles; dehydrogenation; nitrenes; oxygenation;
D O I
10.3998/ark.5550190.0006.a12
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
2-Aryl-2,3-dihydro-1H-pyrrolo[3,4-b] quinoxalines 8a-d react with ethenetetracarbonitrile (TCNE) in aerated benzene with formation of [3-(2-aryl-3-dicyanomethylene-2,3-dihydro-1H-pyrrolo[ 3,4-b] quinoxalin-1-ylidene)-2-aryl-2,3-dihydro-1H-pyrrolo[3,4-b] quinoxalin-1-ylidene] propanedinitriles 9a-d (41 - 48%), [2-aryl-3-arylimino-2,3-dihydro-1H-pyrrolo[3,4-b]quinoxalin-1-ylidene] propanedinitriles 10a-d (19 - 22%) as well as quinoxaline-2,3-diol (11, 8 - 11%). Rationales for these transformations are presented.
引用
收藏
页码:139 / 149
页数:11
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