作者:M. Uvais、S. Sultanbawa、Sivagnanasundram Surendrakumar
DOI:10.1016/0031-9422(89)80059-7
日期:1989.1
Abstract Two new pyranodihydrobenzoxanthones have been isolated from the bark of Artocarpus nobilis and their structures established as 5,6,11-trihydro-1,3,4,8-tetrahydroxy-5-isopropenyl-11,11-dimethylbenzo[1,2:a]pyrano [2′,3′:j]xanthene-7-one(artobiloxanthone) and 5,5a,6,11-tetrahydro-1,3,8-trihydroxy-5,5,11,11-tetramethylbenzo- furo [3,3a,4:ab] pyrano [2′,3′.jlxanthen-7-one (cycloartobiloxanthone)
摘要 从紫檀树皮中分离出两种新型吡喃二氢苯并氧杂蒽酮,其结构为 5,6,11-trihydro-1,3,4,8-tetrahydroxy-5-isopropenyl-11,11-二甲基苯并[1,2: a]pyrano [2',3':j]xanthene-7-one(artobiloxanthone) 和 5,5a,6,11-tetrahydro-1,3,8-trihydroxy-5,5,11,11-tetramethylbenzo-furo [3,3a,4:ab] 吡喃 [2',3'.jlxanthen-7-one (cycloartobiloxanthone)。这是植物中二氢苯并氧杂蒽酮的首次报道。提出了一种从简单黄酮中合成苯并氧杂蒽酮的合理生物合成路线。