摘要
Synthetic studies on 4-demethyl-qinghaosu involving preparation of key intermediate olefin 5 and its photooxygenation were described. Experiment showed that rearrangement product 11 was formed predominantly instead of the desired allylic peroxide 4 during the photooxygenation.
Synthetic studies on 4-demethyl-qinghaosu involving preparation of key intermediate olefin 5 and its photooxygenation were described. Experiment showed that rearrangement product 11 was formed predominantly instead of the desired allylic peroxide 4 during the photooxygenation.