First Propargyl Azides Bearing Strong Acceptor Substituents and Their Effective Conversion into Allenyl Azides: Influence of the Electronic Effects of Substituents on the Reactivity of Propargyl Azides
作者:Joseph Rodolph Fotsing、Klaus Banert
DOI:10.1002/ejoc.200500135
日期:2005.9
We have succeeded in the synthesis of propargyl azides containing 1- or 3-phenylthio functionalities. The selective oxidation of their sulfur atoms to sulfoxides and sulfones allows access to the first propargyl azides bearing acceptor substituents. Interestingly, the prototropic rearrangement of the latter propargyl azides leads to the formation of allenyl azides with relatively high stabilities and
我们已成功合成含有 1- 或 3- 苯硫基官能团的炔丙基叠氮化物。将它们的硫原子选择性氧化为亚砜和砜,可以获得第一个带有受体取代基的炔丙基叠氮化物。有趣的是,后者炔丙基叠氮化物的质子重排导致形成具有相对高稳定性和中等至良好产率的烯基叠氮化物。含有苯硫基官能团的炔丙基叠氮化物在亲核试剂存在下反应,通过短寿命的烯基叠氮化物提供预期的 N-未取代的 1,2,3-三唑。这些结果与相应的亚砜和砜的结果完全不同,它们在类似条件下反应生成相应的双(三唑并)吡嗪衍生物或生成新取代的乙烯基叠氮化物。后一种化合物可以成功地用作原料,提供获得氮丙啶的途径。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)