dialkyl 2-alkyl (aryl) amino-6,11-dihydro-12-hydroxy-6,11-dioxo-4H-naphtho [2,3-g]chromene-3,4-dicarboxylates in good yields. When the reactions were carried out in the presence of ethyl propiolate as acetylenic component, ethyl 4-alkyl (aryl) imino-4-(9,10-dihydro-1-hydroxy-9,10-dioxoanthracen-2-yloxy)but-2-enoates were obtained. Graphical abstract
摘要通过将
异氰酸酯加成到
乙炔基二
羧酸二烷基
酯上而生成的反应性
中间体被
茜素捕获,从而生成2-烷基(芳基)
氨基-6,11-dihydro-12-hydroxy-6,11-dioxo-4 H-
萘二烷基[2, 3 - g ] 1,3-亚丙基3,4-二
羧酸酯具有良好的产率。当反应在
丙炔酸乙酯作为炔属组分存在下进行时,乙基4-烷基(芳基)亚
氨基-4-(9,10-二
氢-1-羟基-9,10-二
氧代
蒽-2-基
氧基)但是-获得2-
烯酸
酯。 图形概要