Electrochemical Dimerization of Phenylpropenoids and the Surprising Antioxidant Activity of the Resultant Quinone Methide Dimers
作者:Kevin J. Romero、Matthew S. Galliher、Mark A. R. Raycroft、Jean‐Philippe R. Chauvin、Irene Bosque、Derek A. Pratt、Corey R. J. Stephenson
DOI:10.1002/anie.201810870
日期:2018.12.21
functional group tolerance, resulting in a unified approach for the synthesis of a range of natural products and related analogues with excellent regiocontrol. The operational simplicity of the method allows for greater efficiency in the synthesis of complex natural products. Interestingly, the quinonemethide dimer intermediates are potent radical-trapping antioxidants; more so than the phenols from
Aerobicoxidative dimerization of hydroxystilbenoids is described. A Cr–salen complex catalyzed the dimerization of hydroxystilbenoids in 1,1,1,3,3,3-hexafluoroisopropanol to form compounds comprising a natural product-like scaffold (quadrangularin) or its precursor depending on the aromatic substituents. The addition of a catalytic amount of scandium triflate [Sc(OTf)3] to the reaction system altered