An Enantioselective Total Synthetic Approach to (+)-Heptemerone G and (+)-Guanacastepene A from 2-Furyl Methyl Carbinol
摘要:
An enantioselective synthesis of the key bicyclic building block for (+)-heptemerone G and (+)-guanacastepene A construction has been accomplished. 2-Furyl methyl carbinol was used as the starting material and (S)-4-hydroxy-2-methylcyclopent-2-en-1-one as the primal optically active intermediate.
A convenient preparation of (S)-(−)-4-hydroxy-2-methylcyclopent-2-en-1-one and its application as a chiral synthetic equivalent of 2-methylcyclopent-2-en-1-one in the terpenoid synthesis
作者:Karol Michalak、Jerzy Wicha
DOI:10.1016/j.tet.2014.06.006
日期:2014.8
from 1-(2-furyl)ethanol using modified Piancatelli rearrangement and enzymatic kinetic resolution of the racemate was developed. An application of O-protected derivatives of 4-hydroxy-2-methylcyclopent-2-en-1-one to terpenoid synthesis through tandem conjugate addition of allyl-metal reagents, enolate trapping, and consecutive Mukaiyama–Michael addition was studied. An optically active azulene derivative