Trifluoromethanesulfonyl azide as a bifunctional reagent for metal-free azidotrifluoromethylation of unactivated alkenes
作者:Hong-Gui Huang、Weishuang Li、Dayou Zhong、Hu-Chong Wang、Jing Zhao、Wen-Bo Liu
DOI:10.1039/d0sc06473d
日期:——
Vicinal trifluoromethyl azides have widespread applications in organic synthesis and drug development. However, their preparation is generally limited to transition-metal-catalyzed three-component reactions. We report here a simple and metal-free method that rapidly provides these buildingblocks from abundant alkenes and trifluoromethanesulfonyl azide (N3SO2CF3). This unprecedented two-component reaction
邻位三氟甲基叠氮化物在有机合成和药物开发中具有广泛的应用。然而,它们的制备通常限于过渡金属催化的三组分反应。我们在这里报告了一种简单且无金属的方法,该方法可快速从丰富的烯烃和三氟甲磺酰叠氮化物(N 3 SO 2 CF 3)提供这些结构单元。这种前所未有的两组分反应采用了容易获得的N 3 SO 2 CF 3作为双功能试剂,可同时引入CF 3和N 3族避免使用它们昂贵且低原子的经济前体。宽泛的官能团,包括与生物有关的杂环和氨基酸,都可以耐受。该方法的应用通过放大合成(5 mmol),产物衍生化为含CF 3的药用化学图案以及天然产物和药物衍生物的后期修饰而得到进一步证明。
Hydromethylation of Unactivated Olefins
作者:Hai T. Dao、Chao Li、Quentin Michaudel、Brad D. Maxwell、Phil S. Baran
DOI:10.1021/jacs.5b05144
日期:2015.7.1
problem of olefin hydromethylation is presented. This highly chemoselective method can tolerate labile and reactive chemical functionalities and uses a simple set of reagents. An array of olefins, including mono-, di-, and trisubstituted olefins, are all smoothly hydromethylated. This mild protocol can be used to simplify the synthesis of a specific target or to directly “edit” complex natural products
EnT-Mediated N–S Bond Homolysis of a Bifunctional Reagent Leading to Aliphatic Sulfonyl Fluorides
作者:Johannes E. Erchinger、Reece Hoogesteger、Ranjini Laskar、Subhabrata Dutta、Carla Hümpel、Debanjan Rana、Constantin G. Daniliuc、Frank Glorius
DOI:10.1021/jacs.2c11295
日期:2023.2.1
functionalized 1,3-sultones were obtained by employing allyl alcohols as substrates. Surprisingly, allyl chloride-derived β-imino sulfonyl fluoride underwent S–O bond formation and ring closure to yield rigid cyclopropyl β-imino sulfonate ester under SuFEx conditions. Furthermore, by engaging a thiol-based hydrogen atom donor in the reaction, the reactivity of the same reagent can be tuned toward the direct