一种受阻路易斯对(FLP)催化的烯丙醇与富电子芳烃的烯丙基化已经被开发出来。有趣的是,在该反应中,富电子芳烃和烯丙醇在水中脱水。更重要的是,水是反应的唯一副产物。在该方案中,各种烯丙醇可以转化为烯丙基阳离子并被富电子芳烃攻击形成芳基阳离子中间体。最后,芳基阳离子中间体去质子化得到1,3-二芳基丙烯。在该方案中,吲哚烯丙醇可以发生双分子闭环反应,可以顺利得到结构多样的四氢吲哚并[3,2- b ]咔唑。该反应对氧气不敏感,并且是在克级水平上进行的。
In high-temperature water a series of benzyl and allylic alcohols reacted with 1,3-dicarbonyl compounds and activated aromatic compounds to give the alkylated products without added catalysts.
Synthesis, Characterization and Catalytic Application of Starch Supported Cuprous Iodide Nanoparticles
作者:Sadhucharan Mallick、Priyabrata Mukhi、Poonam Kumari、Kumari Reshmi Mahato、Suryadev Kumar Verma、Debjit Das
DOI:10.1007/s10562-019-02909-1
日期:2019.12
The starch supported cuprousiodidenanoparticles (CuI-NPs@Starch) were synthesized in aqueous medium and characterized by transmission electron microscopy, scanning electron microscopy, X-ray powder diffraction, energy-dispersive X-ray spectroscopy and atomic absorption spectra analysis. The newly synthesized CuI NPs on starch have been demonstrated first time as an efficient catalyst for the regioselective
在水性介质中合成了淀粉负载的碘化亚铜纳米粒子(CuI-NPs@Starch),并通过透射电子显微镜、扫描电子显微镜、X 射线粉末衍射、能量色散 X 射线光谱和原子吸收光谱分析进行了表征。在淀粉上新合成的 CuI NPs 首次被证明是在水分和空气不敏感的条件下使用各种烯丙醇对 N-取代吲哚和环取代吲哚进行区域选择性 3-烯丙基化反应的有效催化剂。
DES‐Type Interactions To Promote Solvent‐Free and Metal‐Free Reactions between Nitrogen‐Containing Heterocycles and Allylic Alcohols
作者:Mario Martos、Yanira Pérez‐Almarcha、Isidro M. Pastor
DOI:10.1002/ejoc.202201221
日期:2022.11.25
The catalyst [1,3-bis(carboxymethyl)imidazolium chloride] interacts under neat conditions with the reagents in a DES-like manner, providing both substrate activation and reaction media, representing a significant improvement on the way to a lower environmental impact.
催化剂 [1,3-双(羧甲基)咪唑氯化物] 在纯净条件下以类似 DES 的方式与试剂相互作用,同时提供底物活化和反应介质,代表了对降低环境影响的显着改进。