Specificity of the cyclization of 1-alkyl(aryl)sulfonylamino-9,10-anthraquinones into naphtho[1,2,3-cd]indol-6(2H)-ones |
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Authors: | V A Beresnev L M Gornostaev |
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Institution: | (1) Astaf’ev Krasnoyarsk State Pedagogical University, ul. Lebedevoi 89, Krasnoyarsk, 660049, Russia |
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Abstract: | Cyclization of N-(9,10-dioxo-9,10-dihydroanthracen-1-yl)methanesulfonamides to 2,6-dihydronaphtho1,2,3-cd]indol-6-ones in DMSO-KOH involves intermediate formation of 2,3-dihydroanthra1,9-cd]-1λ6,2]thiazin-7-one 2,2-dioxides, whereas heterocyclization of N-(9,10-dioxo-9,10-dihydroanthracen-1-yl)-ethane- and -arenesulfonamides under analogous conditions occurs with participation of methylsulfonylmethanide. |
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