X-ray Absorption and Electron Paramagnetic Resonance Guided Discovery of the Cu-Catalyzed Synthesis of Multiaryl-Substituted Furans from Aryl Styrene and Ketones Using DMSO as the Oxidant
serving not only as a solvent but also as an oxidant to promote the oxidation of Cu(I) to Cu(II) has been demonstrated. X-ray absorption and electron paramagnetic resonance evidence revealed a single-electron redox process where DMSO could oxidize Cu(I) to Cu(II). The novel discovery guided the rational design of copper-catalyzed oxidative cyclization of aryl ketones with styrenes to furans, providing a new
Radical Based Strategy toward the Synthesis of 2,3-Dihydrofurans from Aryl Ketones and Aromatic Olefins
作者:Togati Naveen、Rajesh Kancherla、Debabrata Maiti
DOI:10.1021/ol502688r
日期:2014.10.17
with a wide range of aromatic olefins has been developed. This strategy allowed convenient access to 2,3-dihydrofuran derivatives. The versatility of the protocol is shown by synthesizing α-methyl dihydrofurans, which serve as an intermediate for the synthesis of vitamin B1. In addition, the applicability of the protocol in conjugated systems is demonstrated. A radical pathway was presumed and supported