Enantioselective Total Synthesis of a Potent Antitumor Antibiotic, Fredericamycin A
作者:Yasuyuki Kita、Kazuhiro Higuchi、Yutaka Yoshida、Kiyosei Iio、Shinji Kitagaki、Koichiro Ueda、Shuji Akai、Hiromichi Fujioka
DOI:10.1021/ja0035699
日期:2001.4.1
Particular attention has been given to the novel synthesis of the optically active spiro carbon center by a stereospecific rearrangement of optically active benzofuzed-trans-epoxy acylates leading to spirocyclopentane-1,1'-indane systems. This method is quite useful for the construction of an optically active spiro compound and was applied to the synthesis of the optically pure CDEF-ring unit of 1. Cycloaddition
强效抗肿瘤抗生素弗雷德里霉素 A (1) 的两种对映异构体的不对称全合成基于构建其在螺碳处具有手性的周围羟基多芳烃骨架的协议,通过强碱诱导的适当取代的环加成具有光学活性 CDEF 环单元的同苯二甲酸酐(AB 环单元)。通过旋光苯并呋喃-反式环氧酰化物的立体定向重排,形成螺环戊烷-1,1'-茚满系统,对旋光螺碳中心的新型合成给予了特别关注。该方法对于构建具有旋光活性的螺环化合物非常有用,并被应用于光学纯 CDEF 环单元 1 的合成。