Montmorillonite K-10 catalyzed cyclization of N-ethoxycarbonyl-Nâ²-arylguanidines: Access to pyrimido[4,5-c]carbazole and pyrimido[5,4-b]indole derivatives
Keywords: هتروسیکلهای نیتروژن; Nitrogen heterocycles; Carbazole; Indole; Friedel-Crafts; DNA binding; Topoisomerase;