作者:Fernando Portela-Cubillo、James Lymer、Eoin M. Scanlan、Jackie S. Scott、John C. Walton
DOI:10.1016/j.tet.2008.08.112
日期:2008.12
an atom-efficient way of generating iminyl radicals. The process was most efficient for dioxime oxalates having aryl substituents attached to their CN bonds. The method was useful for EPR spectroscopic study of iminyl and iminoxyl radicals. Photolyses in toluene solution, of dioxime oxalates containing alkenyl acceptor groups, yielded unsaturated iminyl radicals that ring closed to afford 3,4-dihydro-2H-pyrroles
通过用草酰氯处理肟来制备对称和不对称的草酸二肟。发现这些前体的UV光解是产生亚氨基自由基的原子有效方式。该方法对于在其CN键上连接有芳基取代基的草酸二肟酯是最有效的。该方法可用于亚胺基和亚胺氧基的EPR光谱研究。含烯基受体基团的草酸二肟酯在甲苯溶液中的光解产生不饱和的亚氨基,自由基闭环生成3,4-二氢-2 H-吡咯收率高。具有联苯取代基的草酸二肟酯也释放了亚甲基基团,该亚甲基基团闭环在芳族受体基团上,在乙腈溶液中,该方法提供了一种有用且原子高效的方法来制备取代的菲啶。