A short route to avenaciolide & isoavenaciolide via radical cyclization
摘要:
The bicyclic ether/lactone 5 was prepared from 7 in 6 steps including radical cyclization and a Pummerer rearrangement. After 5 was converted to 12 and 13 under KecK's conditions, divergent formal total syntheses of avenaciolide and isoavenaciolide were accomplished in four additional steps.
A short route to avenaciolide & isoavenaciolide via radical cyclization
摘要:
The bicyclic ether/lactone 5 was prepared from 7 in 6 steps including radical cyclization and a Pummerer rearrangement. After 5 was converted to 12 and 13 under KecK's conditions, divergent formal total syntheses of avenaciolide and isoavenaciolide were accomplished in four additional steps.
2,3-Disubstituted tetrahydrofuran synthesis via radical and anionic cyclization
作者:Steven D. Burke、Kyung Woon Jung
DOI:10.1016/s0040-4039(00)78197-4
日期:1994.8
Cyclization of the radicals derived from Cbond homolysis as well as via 1,5-hydrogen atom transfer afforded tetrahydrofurans in high yield. An alternative anionic cyclization method provided the anti diastereomer preferentially.