Verdazyl Radicals as Substrates for Organic Synthesis: A Synthesis of 3-Methyl-5-aryl-1,3,4-oxadiazolones
作者:Matthew Bancerz、Michael K. Georges
DOI:10.1021/jo200820g
日期:2011.8.5
the hydrolysis reaction are obtained from efficient 1,3-dipolar cycloaddition reactions of styrene and azomethine imine dipoles derived from verdazyl radicals via a disproportionation reaction. A proposed mechanism for the formation of these biologically relevant oxadiazolones includes an opening of the tetrazinone ring followed by a 5-exo-trig ring closure. In support of the mechanism, in one case the
描述了一系列3-甲基-5-芳基-1,3,4-恶二唑酮化合物在水解条件下的恶二唑酮的合成。水解反应的独特起始原料是从苯乙烯和偶氮甲亚胺亚胺的偶极偶极有效的1,3-偶极环加成反应中获得的,这些偶极偶极由Verdazyl自由基经歧化反应衍生而来。提出的形成这些生物学上相关的恶二唑酮的机制包括打开四嗪酮环,然后关闭5- exo - trig环。为了支持该机理,在一种情况下,分离了开环中间体,随后用酸处理,得到了相关的恶二唑酮。