Spirolactones of xanthene. IV New method of xanthone synthesis by oxidation of novel spirolactones of dibenzo[c,h]xanthene and xanthenes.
作者:MICHIO KIMURA、ICHIZO OKABAYASHI
DOI:10.1248/cpb.35.136
日期:——
Dibenzo [c, h] xanthone and halogen-and methyl-substituted xanthones have been synthesized by the oxidation of novel spirolactones of dibenzo [c, h] xanthene and xanthene, which were prepared by a new condensation reaction of 1-naphthol or phenol derivatives with oxalic acid in the presence of sulfuric acid. The oxidation was carried out by using potassium permanganate in the presence of aqueous potassium hydroxide. The dibenzo [c, h] xanthone and xanthones were identical with samples obtained by another synthetic route.
通过氧化二苯并[c,h]氧杂蒽和氧杂蒽的新型螺内酯,合成了二苯并[c,h]氧杂蒽和卤代和甲基取代的氧杂蒽酮;二苯并[c,h]氧杂蒽和氧杂蒽是由 1-萘酚或苯酚衍生物与草酸在硫酸存在下发生新的缩合反应制备的。氧化反应是在氢氧化钾水溶液中使用高锰酸钾进行的。二苯并 [c, h] 呫吨酮和呫吨酮与通过另一种合成途径获得的样品相同。