Stereoselective synthesis of the 6,7,6- and 6,7,7-ring systems of polycyclic ethers by 6-endo cyclization and ring expansion
作者:Yuji Mori、Keisuke Yaegashi、Hiroshi Furukawa
DOI:10.1016/s0040-4020(97)00816-8
日期:1997.9
A new strategy for the stereoselective synthesis of the trans-fused seven-membered cyclic ethers corresponding to subunits of brevetoxin B and hemibrevetoxin B has been developed. The strategy involves alkylation of an oxiranyl anion and 6-endo cyclization followed by one-carbon homologation of a tetrahydropyran to an oxepane using trimethylsilyldiazomethane.
为的立体选择性合成的新战略反式-融合对应双鞭甲藻毒素B和hemibrevetoxin B的亚基7元环醚已经研制成功。该策略涉及环氧乙烷阴离子和6-烷基化内切环化随后是四氢吡喃用三甲基甲硅烷的氧杂环庚烷的一碳同系化。