The reaction of 2-amino- N ′-arylbenzamidines with tetracyanoethene reinvestigated: routes to imidazoles, quinazolines and quinolino[2′,3′:4,5]imidazo[1,2- c ]quinazoline-8-carbonitrile
作者:Styliana I. Mirallai、Maria Manoli、Panayiotis A. Koutentis
DOI:10.1016/j.tet.2015.09.049
日期:2015.11
with tetracyanoethene (TCNE) to give 2-[2-(2-aminophenyl)-5-imino-1-phenyl-1H-imidazol-4(5H)-ylidene]malononitrile (11a), 4-(phenylamino)quinazoline-2-carbonitrile (5a) and 4-imino-3-phenyl-3,4-dihydroquinazoline-2-carbonitrile (9a). By optimizing the reaction conditions each of the compounds can be isolated as the main product and seven examples of these reactions are described. The [1H-imidazol-4(
Synthesis of benzimidazoles by two methods (C–H functionalization and condensation reaction) catalyzed by α-zirconium hydrogen phosphate-based nanocatalyst
作者:Abdol R. Hajipour、Saedeh Zakery、Zahra Khorsandi
DOI:10.1007/s13738-020-01884-4
日期:2020.8
applied. These heterogeneous catalysts have demonstrated the promising catalytic activity for the synthesis of 2-substitutedbenzimidazoles in two different methods. One of these reactions is the functionalization of the C–H bond and the formation of C–N bond, and the other reaction involves the condensation reaction between aldehydes and 1,2-phenylenediamine. The activity of both catalysts was compared