Generation of Nitrile Oxides under Nanometer Micelles Built in Neutral Aqueous Media: Synthesis of Novel Glycal-Based Chiral Synthons and Optically Pure 2,8-Dioxabicyclo[4.4.0]decene Core
作者:Nirbhik Chatterjee、Palash Pandit、Samiran Halder、Amarendra Patra、Dilip K. Maiti
DOI:10.1021/jo801337k
日期:2008.10.3
for chemoselective oxidation of aldoximes to nitrile oxides by iodosobenzene in neutral aqueous media is reported. Their in situ intermolecular 1,3-dipolar cycloaddition (1,3-DC) with olefins in nanometer aqueous micelles occurs with improved stereoselectivity and acceleration of reaction rate toward synthesis of new chiral synthons, 3-(2'-C-3',4',6'-tri-O-benzylglycal)-Delta(2)-isoxazolines and others
报道了一种在中性水性介质中碘代苯将醛肟化学选择性氧化为腈氧化物的高效策略。他们在纳米水性胶束中与烯烃进行原位分子间1,3-偶极环加成反应(1,3-DC),提高了立体选择性,并加快了反应速度,从而合成了新的手性合成子3-(2'-C-3', 4′,6′-三-O-苄基糖基)-Delta(2)-异恶唑啉等。用这种绿色方法进行光学纯的2,8-二氧杂双环[4.4.0]癸烯骨架的构建,并通过B3LYP密度泛函理论预测了新的手性中心的立体化学。