Synthesis of Dihydrobenzisoxazoles by the [3 + 2] Cycloaddition of Arynes and Oxaziridines
作者:Arif Kivrak、Richard C. Larock
DOI:10.1021/jo101656c
日期:2010.11.5
unusual cleavage of the C−O bond of the oxaziridine and tolerates a variety of substituents on the oxaziridine and the o-(trimethylsilyl)aryl triflate to form aryl-, heteroaryl-, alkyl-, and naphthyl-substituted dihydrobenzisoxazoles. The resulting halogen-substituted dihydrobenzisoxazoles are readily elaborated to more complex products using palladium-catalyzed crossing-coupling processes.
二氢苯并异恶唑很容易通过氧氮丙啶和芳炔的[3+2]环加成以良好的产率制备。该反应涉及氧氮杂环丙烷的CO键的异常断裂,并耐受氧氮杂环丙烷和邻-(三甲基甲硅烷基)芳基三氟甲磺酸酯上的各种取代基,形成芳基-、杂芳基-、烷基-和萘基取代的二氢苯并异恶唑。使用钯催化的交叉偶联过程可以将所得的卤素取代的二氢苯并异恶唑轻松地加工成更复杂的产物。