Synthesis of heteroarenes using cascade radical cyclisation via iminyl radicals
作者:W. Russell Bowman、Martin O. Cloonan、Anthony J. Fletcher、Tobias Stein
DOI:10.1039/b501509j
日期:——
Cascade radicalcyclisation involving homolytic aromatic substitution has been used to synthesise new tetracycles. Treatment of vinyl iodide radical precursors with Me(3)Sn. radicals (from hexamethylditin) yielded intermediate vinyl radicals which undergo 5-exo cyclisation onto suitably placed nitrile groups to yield intermediate iminyl radicals. The iminyl radicals undergo aromatic homolytic substitution