A radical-mediated 1,3,4-trifunctionalization cascade of 1,3-enynes with sulfinates and <i>tert</i>-butyl nitrite: facile access to sulfonyl isoxazoles
作者:Xin Yue、Ming Hu、Xingyi He、Shuang Wu、Jin-Heng Li
DOI:10.1039/d0cc01659d
日期:——
indium-promoted three-component 1,3,4-trifunctionalization cascade of 1,3-enynes with sodium sulfinates and tert-butyl nitrite (TBN) to access 5-sulfonylisoxazoles via [3+2] annulation is reported. By employing TBN as both the radical initiator and the N–O two atom unit, this method enables the formation of three new carbon–heteroatom bonds, C–S, C–N and C–O bonds, in a single reaction through a sequence
据报道,史无前例的铟促进了1,3-炔烃与亚磺酸钠和亚硝酸叔丁酯(TBN)的三组分1,3,4-三官能化级联反应,可通过[3 + 2]环化反应获得5-磺酰基异恶唑。通过将TBN用作自由基引发剂和N–O两个原子单元,该方法可在单个反应中通过一个序列形成三个新的碳-杂原子键,C–S,C–N和C–O键具有广泛的底物范围,优异的选择性和天然产物后期功能化潜力的磺酰化,异构化,硝化和环化反应。