AbstractFive‐membered difluoroboryl chelate complexes are competent substrates for radical reactions with various radical precursors including potassium trifluoroborates, bis(catecholato)siliconates, 4‐alkyl‐substituted Hantzsch esters, dihydroquinazolinones, esters of N‐hydroxyphthalimide, Katritzky salts, alkyl iodides and thiols. Using these reagents, primary, secondary, and tertiary radicals can be generated under oxidative or reductive conditions and add at the C=N bond of the difluoroboryl chelates leading to hydrazide products.
摘要五元二氟硼酸螯合物是与各种自由基前体(包括三氟硼酸钾、双(邻苯二酚)硅酸盐、4-烷基取代的 Hantzsch 酯、二氢喹唑啉酮、N-羟基邻苯二甲酰亚胺酯、Katritzky 盐、烷基碘化物和硫醇)发生自由基反应的有效底物。使用这些试剂,可在氧化或还原条件下生成伯、仲和叔自由基,并与二氟溴螯合物的 C=N 键相加,生成酰肼产物。