Stereoselective Isoxazolidine Synthesis Via Copper-Catalyzed Alkene Aminooxygenation
作者:Shuklendu D. Karyakarte、Thomas P. Smith、Sherry R. Chemler
DOI:10.1021/jo3013226
日期:2012.9.7
Isoxazolidines are useful in organic synthesis, drug discovery, and chemical biology endeavors. A new stereoselective synthesis of methyleneoxy-substituted isoxazolidines is disclosed. The method involves copper-catalyzed aminooxygenation/cyclization of N-sulfonyl-O-butenyl hydroxylamines in the presence of (2,2,6,6-tetramethylpiperidin-1-yl)oxyl radical (TEMPO) and O2 and provides substituted isoxazolidines
异恶唑烷可用于有机合成、药物发现和化学生物学研究。公开了亚甲氧基取代的异恶唑烷的新立体选择性合成。该方法包括在 (2,2,6,6-四甲基哌啶-1-基)氧基自由基 (TEMPO) 和 O 2存在下铜催化的N-磺酰基-O-丁烯基羟胺的氨基氧化/环化,并提供取代的异恶唑烷优异的产率和非对映选择性。我们还展示了选择性单 N-O 还原,然后氧化剩余的 N-O 键以显示 2-氨基-γ-内酯。γ-内酯的还原揭示了相应的氨基二醇。