A New Use of Wittig-Type Reagents as 1,3-Dipolar Cycloaddition Precursors and in Pyrrole Synthesis
作者:Daniel J. St. Cyr、Bruce A. Arndtsen
DOI:10.1021/ja074330w
日期:2007.10.1
generate a new class of phosphorus-based 1,3-dipolar cycloaddition reagent. These substrates, which are isomeric forms of classic Wittig reagents, undergo cycloaddition reactions in an analogous fashion to 1,3-oxazolium-5-oxides (Munchnones). However, these 1,3-dipoles can be generated in one pot, in a modular fashion, and directly from available reagents, suggesting their potential general utility in
已发现亚胺、酰氯和亚膦酸酯的一锅反应生成一类新的磷基 1,3-偶极环加成试剂。这些底物是经典 Wittig 试剂的异构形式,以与 1,3-恶唑鎓-5-氧化物(Munchnones)类似的方式进行环加成反应。然而,这些 1,3-偶极子可以在一锅中以模块化方式直接从可用的试剂中生成,这表明它们在杂环合成中具有潜在的通用性。后者在从各种亚胺、酰氯和炔烃合成吡咯的亚膦酸酯介导的设计中得到了说明。