Synthesis of 2-hydroxy-3-methylbut-3-enyl substituted coumarins and xanthones as natural products. Application of the Schenck ene reaction of singlet oxygen with ortho-prenylphenol precursors

Add time:08/25/2019    Source:sciencedirect.com

Application of our original photooxidation–reduction methodology to prenylated dihydroxycoumarin and trihydroxyxanthone compounds led to the corresponding ortho-(2-hydroxy-3-methylbut-3-enyl)phenol derivatives with yields ranging from 8 to 65%. In most of the reported experiments, the oxidation products distribution, after the photooxygenation step, was controlled by the competition between the large group effect and the stabilising phenolic assistance effect. We also showed that ortho-(3-hydroxy-3-methylbut-1-enyl)phenol derivatives could be considered as biogenetic precursors of 2,2-dimethylbenzopyranic structures.

We also recommend Trading Suppliers and Manufacturers of 6-(3-methylbut-2-enyl)-1H-indole-2,3-dione (cas 101023-73-8). Pls Click Website Link as below: cas 101023-73-8 suppliers

Prev:A functional (E)-4-hydroxy-3-methylbut-2-enyl diphosphate reductase exhibits diurnal regulation of expression in Stevia rebaudiana (Bertoni)
Next:New route to 4,4,6,7-tetrasubstituted pentacyclo[6.3.0.02,6.03.10.05,9]undecanes)