Domino Fragmentations in Traceless Directing Groups of Radical Cascades: Evidence for the Formation of Alkoxy Radicals via C–O Scission
作者:Trevor Harris、Gabriel dos Passos Gomes、Ronald J. Clark、Igor V. Alabugin
DOI:10.1021/acs.joc.6b01052
日期:2016.7.15
Direct evidence for the formation of alkoxy radicals is reported in radical cascades using traceless directing groups. Despite the possibility of hydrogen abstraction in the fragmenting step, followed by loss of R-OH, β-scission is preferred for the formation of alkoxy radicals. For the first time, the C-O radical was intermolecularly trapped using a silyl enol ether. Various C–X fragmenting groups