Total Asymmetric Synthesis of the Aphidicolin Derivative (11<i>R</i>)-(−)-8-Epi-11-hydroxyaphidicolin Using Tandem Transannular Diels−Alder/Aldol Reactions
作者:Guillaume Bélanger、Pierre Deslongchamps
DOI:10.1021/ol990341l
日期:2000.2.1
[reaction: see text] Aphidicolin unnatural derivative (2) was synthesized using a new tandem transannularDiels-Alder/aldol methodology. The 8-epi-aphidicolane skeleton is constructed in a highly diastereoselective manner and converted into (11R)-(-)-8-epi-11-hydroxyaphidicolin (2). An efficient method for the difficult C16 funtionalization is presented.
New Approach to Aphidicolin and Total Asymmetric Synthesis of Unnatural (11<i>R</i>)-(−)-8-Epi-11-hydroxyaphidicolin by Tandem Transannular Diels−Alder/Aldol Reactions
作者:Guillaume Bélanger、Pierre Deslongchamps
DOI:10.1021/jo0007635
日期:2000.10.1
The 8-epiaphidicolane skeleton (3) was formed in one key reaction by highly diastereoselective tandem transannularDiels-Alder (TADA)-aldol reactions from the trans-trans-cis trienic macrocycle (4). The unnatural derivative (11R)-(-)-8-epi-11-hydroxyaphidicolin (2) was thus constructed, and an original solution to the C16 functionalization problem of many aphidicolin (1) syntheses is presented.