Divergent Reactivity of 2-Azetidinone-Tethered Allenols with Electrophilic Reagents: Controlled Ring Expansion<i>versus</i>Spirocyclization
作者:Benito Alcaide、Pedro Almendros、Amparo Luna、M. Rosario Torres
DOI:10.1002/adsc.200900864
日期:2010.3.8
A dual reactivity of 2‐azetidinone‐tethered allenols may occur by judicious choice of the electrophilic reagents, namely halogenating versus selenating reagents. Using common substrates, structurally different compounds, namely tetramic acids (from N‐bromosuccinimide) or spirocyclic seleno‐β‐lactams (from N‐phenylselenophthalimide), can be readily synthesized by these divergent protocols.
明智地选择亲电试剂,即卤化试剂与硒化试剂,可能会发生2-氮杂环丁酮系链的烯丙醇的双重反应。使用常见的底物,可以通过这些不同的方案轻松合成结构上不同的化合物,即四酸(来自N-溴代琥珀酰亚胺)或螺环硒基-β-内酰胺(来自N-苯基硒代邻苯二甲酰亚胺)。