这篇完整的报告介绍了两种不同羰基物质的氧化分子间偶联的背景、发现和广泛的见解。该过程的优化最终形成了使用可溶性铜 (II) 或铁 (III) 盐作为氧化剂将酰胺、酰亚胺、酮和羟吲哚结合的可靠且可扩展的方案。广泛的机理研究表明,在铜 (II) 的情况下是金属螯合的单电子转移过程,而基于铁 (III) 的偶联似乎是通过非模板化的异二聚化进行的。这项工作提供了迄今为止对氧化烯醇偶联机制最深入的发现。氧化烯醇杂偶联的范围很广(40 个例子),并且已被证明即使在大规模(克级或更大)上也是有效的。最后,
Laser Flash Photolysis Studies of Alkoxyl Radical Kinetics Using 4-Nitrobenzenesulfenate Esters as Radical Precursors
作者:John H. Horner、Seung-Yong Choi、Martin Newcomb
DOI:10.1021/ol006469g
日期:2000.10.1
4-Nitrobenzenesulfenate esters were used as precursors for the generation of alkoxyl radicals under laserflashphotolysis conditions. The esters were efficiently cleaved using the Nd:YAG third harmonic (355 nm) to produce alkoxyl radicals and the 4-nitrobenzenethiyl radical. Rate constants for beta-scission and 1, 5-hydrogen abstraction reactions of alkoxyl radicals were measured.