Herein, with air-stable chalcogenated stibines (Sb–ER) as organometallic chalcogenating reagents, we developed base-promoted (Z)-hydrochalcogenation of alkynes with DMSO/DMSO-d6 as hydrogen/deuterium sources, giving chalcogenated (Z)-olefins in good yields and with excellent regioselectivity. These reagents, easily synthesized from halostibines with in situ generated [Zn(ER)2] at room temperature within
在此,我们以空气稳定的硫属代锑 ( Sb –ER) 作为有机金属硫属化合物试剂,开发了以 DMSO/DMSO- d 6作为氢/氘源的碱促进 ( Z )-炔烃的氢化反应,得到硫属代 ( Z )-烯烃产率高,区域选择性好。这些试剂很容易在室温下几分钟内由卤代锡与原位生成的 [Zn(ER) 2 ] 合成,也可用于碱促进的 C( sp 3 )-S(Se) 与 C 的交叉偶联( sp 3 )–X 和铜催化的 C( sp 2 )–S(Se) 与 C(sp 2 )–X (X = F, CI, Br, I) 在温和条件下。该协议也可以简单地扩展到具有良好功能耐受性的有机铋复合物 ( Bi -ER)。
Cornforth et al., Journal of the Chemical Society, 1959, p. 2539,2545
作者:Cornforth et al.
DOI:——
日期:——
Discovery of Novel Tetramethylpyrazine containing Chalcone Derivatives as Anti-Inflammatory Agents
作者:Syed Nasir Abbas Bukhari、Mohamed Abdelwahab Abdelgawad、Muhammad Wahab Amjad、Muhammad Usman Munir、Fatima Akbar Sheikh
DOI:10.2174/1573406419666230112110306
日期:2023.1.12
anti-inflammatory agents, two series of chalcone derivatives and chalcone-based oximes were synthesized and characterized. To integrate the tetramethylpyrazine moiety into these novel molecules, the multifunctional natural chemical ligustrazine was employed. Methods: A variety of newly synthesized ligustrazine-based chalcones were utilized as precursors for the synthesis of newoximes and their inhibitory activity