The cyanation of acetals and orthoesters by using a stericallycongestedα-cyanoamine as a cyanatingreagent was investigated. The α-cyanoamine effectively facilitated cyanation in the presence of trichlorosilyl triflate to produce a variety of cyanated adducts in excellent yields. Analysis of the reaction mixture by 1H NMR spectroscopy revealed that trichlorosilyl triflate produced an oxocarbenium
研究了使用空间拥挤的 α-氰胺作为氰化试剂对缩醛和原酸酯进行氰化。α-氰基胺在三氟甲磺酸三氯甲硅烷酯存在下有效促进氰化,以优异的产率生产各种氰化加合物。通过 1 H NMR 光谱分析反应混合物表明,三氟甲磺酸三氯甲硅烷基酯产生作为中间体的氧代碳鎓阳离子物质。
Synthesis of Pd supported on 3,4-diaminobenzoic acid functionalized Fe<sub>3</sub>O<sub>4</sub> nanoparticles as a magnetic catalyst for synthesis of 2-methoxy-2-phenylacetonitrile derivative via a strecker-type reaction under ambient and solvent-free conditions
作者:Hanpeng Zhang、Mohaddese Mirshekari
DOI:10.1080/00958972.2021.2024172
日期:2021.12.17
Abstract Pd supported on 3,4-diaminobenzoic acid functionalized Fe3O4 magnetic nanoparticles as an organic-inorganic hybrid heterogeneous catalyst was fabricated and characterized by FT-IR, XRD, SEM, TEM, TGA, VSM, EDX, and ICP-AES techniques. The catalytic activity of the magnetic catalyst was probed through a Strecker-type reaction for one-pot synthesis of 2-methoxy-2-phenylacetonitrile derivatives
摘要 制备了负载在 3,4-二氨基苯甲酸功能化 Fe 3 O 4磁性纳米粒子上的 Pd 作为有机-无机杂化多相催化剂,并通过 FT-IR、XRD、SEM、TEM、TGA、VSM、EDX 和 ICP-AES 技术对其进行了表征. 磁性催化剂的催化活性通过 Strecker 型反应在环境和无溶剂条件下一锅合成 2-甲氧基-2-苯基乙腈衍生物进行了探测。该协议的优点是程序简单、产量高、反应时间短和环境友好的方法。催化剂很容易使用外部磁铁分离,并可重复使用,而不会显着降低其催化效率。
Unique chemoselective Strecker-type reaction of acetals with TMSCN catalyzed by MgI<sub>2</sub> etherate
作者:Hua Li、Haokun Pan、Xiangwei Meng、Xingxian Zhang
DOI:10.1080/00397911.2019.1711413
日期:2020.3.3
Abstract An efficient and convenient Strecker-type addition of various substituted aromaticacetals, heteroaromatic acetals and α, β-unsaturated acetals with trimethylsilyl cyanide (TMSCN) is achieved catalyzed by 10 mol% of MgI2 etherate (MgI2•(Et2O)n) in a mild, and high chemoselective manner with good to excellent yields. A non-coordinating reaction media (i.e., CH2Cl2) played a vital role in this
Shi, Min; Okamoto, Yoshiki; Takamuku, Setsuo, Journal of Chemical Research, Miniprint, 1990, # 5, p. 1044 - 1054
作者:Shi, Min、Okamoto, Yoshiki、Takamuku, Setsuo
DOI:——
日期:——
Synthesis and characterization of Pd supported on methane diamine (propyl silane) functionalized Fe<sub>3</sub>O<sub>4</sub> nanoparticles as a magnetic catalyst for synthesis of α-aminonitriles and 2-methoxy-2-phenylacetonitrile derivative via Strecker-type reaction under ambient and solvent-free conditions