【摘 要】
：
2, 3, 11, 12-Tetramethoxy-3b, 4, 5, 6-tetrahydro-8H-7a-aza-benzo[fg]naphthacen-7-one 7 was synthesized via N-acyliminium ion cyclization of 6-hydroxy-1-(2, 3, 6
【出 处】
：
Chinese Chemical Letters
论文部分内容阅读
2, 3, 11, 12-Tetramethoxy-3b, 4, 5, 6-tetrahydro-8H-7a-aza-benzo[fg]naphthacen-7-one 7 was synthesized via N-acyliminium ion cyclization of 6-hydroxy-1-(2, 3, 6, 7-tetramethoxy- phenanthren-9-yl-methyl)-piperidin-2-one 6 catalyzed by BF3OEt2. The stereostructure of the intermediate, 1-(2, 3, 6, 7-tetramethoxy-phenanthren-9-yl-methyl)-piperidine-2, 6-dione 5, was confirmed by X-ray crystallographic analysis. Compound 7 showed no cytotoxicity.
2, 3, 11, 12-Tetramethoxy-3b, 4,5,6-tetrahydro-8H-7a-aza-benzo [fg] naphthacen-7-one 7 was synthesized via N-acyliminium ion cyclization of 6-hydroxy-1 - (2,3,6,7-tetramethoxy-phenanthren-9-yl-methyl) -piperidin-2-one 6 was catalyzed by BF3OEt2. The stereostructure of the intermediate, 1- (2,3,6,7-tetramethoxy- phenanthren-9-yl-methyl) -piperidine-2, 6-dione 5 was was by X-ray crystallographic analysis. Compound 7 showed no cytotoxicity.
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