Enol cation radicals in solution. 4. An improved Synthesis of 4,6,7-Trimethylbenzofurans by oxidation of ?-mesityl substituted enols
作者:Maik R�ck、Michael Schmittel
DOI:10.1002/prac.19943360409
日期:——
An improved syntectic access for the construction of 4,6,7-trimethylbenzofurans (B1-B8) through the one-electron oxidation of mesityl-substituted enols (E1-E8) is presented. The transformation can be accomplished in good to excellent yields by using various oxidants; i.e. tris(1,10-phenanthroline)iron(III) hexafluorophosphate, FeCl3, Ce(NH4)2(NO3)6, Cu(OTf)2/Cu2O or anodic oxidation.