Synthesis of sulfonamide derivatives of pyrido-[2,1-b]quinazolin-11-one and pyrido[1,2-a]quinazolin-6-one |
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Authors: | R. M. Shlenev S. I. Filimonov A. V. Tarasov A. S. Danilova P. A. Agat’ev |
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Abstract: | Methods were developed of indirect introduction of sulfonamide group in the structures of pyrido-[2,1-b]quinazolin-11-one and pyrido[1,2-a]quinazolin-6-one underlain by cyclocondensation of 2-halo-5-(Rsulfamoyl) benzoyl chlorides with derivatives of 2-aminopyridine. The fact of thermal rearrangement of 8-(morpholin-4-ylsulfonyl)pyrido[1,2-a]quinazolin-6-one into isomeric 2-(morpholine-4-ylsulfonyl)pyrido[2,1-b]-quinazolin-11-one was experimentally registered. |
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