首页 | 本学科首页   官方微博 | 高级检索  
     


Carbonium cyclization—studies on lignans containing the dibenzocyclooctadiene system,II
Authors:Rui Tan  Xiao-Tian Liang
Abstract:Studies of schisandrol B under Ritter reaction conditions showed similar results to that of schisandrin. However the carbonium cyclization product (4a) of schisandrol B undergoes oxidative ring opening when exposed to the air. Cyclization of schisantherin A (2) also occurs by treatment with thionyl chloride in pyridine. Here the presence of the extra benzoyloxy group somehow confers stability to the diosphenol system and 8 has to be stirred in solution under oxygen for extended periods to effect ring opening.
Keywords:
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号