Synthetic studies of halichondrin B, an antitumor polyether macrolide isolated from a marine sponge. 8. Synthesis of the lactone part (C1C36) via horner-emmons coupling between C1C15 and C16C36 fragments and Yamaguchi lactonization
作者:Kiyoshi Horita、Masaaki Nagasawa、Shun-ichiro Hachiya、Youji Sakurai、Tatsuya Yamazaki、Jun'ichi Uenishi、Osamu Yonemitsu
DOI:10.1016/s0040-4039(97)10364-1
日期:1997.12
The lactone part (2) of halichondrin B (1) was synthesized by Yamaguchi macrolactonization of the seco-acid (3), which was synthesized via coupling of C1C15(4) with C16C36 (5), prepared through stereoselective construction of the E ring starting from C16C26 (7) and C27C36 (8).
通过山口宏观内酯化癸二酸(3)合成了葫芦素B(1)的内酯部分(2),其通过C1 constructionC15(4)与C16C36(5)的偶联合成,并通过立体选择性结构制备从C16C26(7)和C27C36(8)开始的E环。