A new method for the alkynylation of aryldiazonium salts with TMS-alkynes via dual gold and photoredox catalysis is described.
描述了一种使用双金和光氧化还原催化剂对苯基重氮盐进行炔基化反应的新方法。
Electrochemical generation of silver acetylides from terminal alkynes with a Ag anode and integration into sequential Pd-catalysed coupling with arylboronic acids
Sonogashira-type reaction. In the presence of the catalytic amount of Pd(OAc)(2) and 4-BzO-TEMPO, electro-generated silver acetylides reacted immediately with arylboronic acids to afford the corresponding coupling adducts in high yields.
Tri(1-naphthyl)phosphine as a ligand in palladium-free Sonogashira cross-coupling of arylhalogenides with acetylenes
作者:Anastasiya I. Govdi、Sergey F. Vasilevsky、Svetlana F. Malysheva、Olga N. Kazheva、Oleg A. Dyachenko、Vladimir A. Kuimov
DOI:10.1002/hc.21443
日期:2018.7
AbstractTri(1‐naphthyl)phosphine (Np3P) has been easily prepared in 34% yield from red phosphorus and 1‐bromonaphthalene in the superbasic system t‐BuONa/DMSO. The expedient procedures for the synthesis of aryl acetylenes by Sonogashira coupling of aryl iodides with terminal alkynes using Np3P as a ligand have been developed. For the first time, it is found that the reaction with compounds containing electron‐donating substituents preferably affords buta‐1,3‐diynes.
Hetero-bifunctional catalyst manipulates carbonyl and alkynyl reductions of conjugated alkynones in an aqueous medium
作者:Yanchao Su、Fengwei Chang、Ronghua Jin、Rui Liu、Guohua Liu
DOI:10.1039/c8gc02549e
日期:——
carbonyl and alkynyl reductions of conjugated alkynones via a controllable catalysis sequence. The cascade reaction initially goes through Ru-catalyzed asymmetric transfer hydrogenation followed by a Pd/C-catalyzed reduction process to afford various chiral aromatic alcohols in high yields with up to 99% enantioselectivity in an aqueous medium. Furthermore, the designed functionalities of the catalyst
Zinc (II) complex immobilized on the surface of magnetic nanoparticles modified with phenanthroline: A novel and efficient nanomagnetic reusable catalyst for cross-coupling reaction of aryl iodides with terminal aromatic alkynes
Abstract A novel and green nanomagnetic zinc catalyst were fabricated via the immobilization of zinc (II) complex on the surface of magneticnanoparticles modified with phenanthroline (MNPs-Phen-Zn(II)). The structure of MNPs-Phen-Zn(II) nanomaterial was characterized by a series of spectroscopic techniques including FT-IR spectroscopy, SEM, TEM, EDX, XRD, VSM, and ICP-OES. The resulting zinc nanomagnetic
摘要 通过将锌 (II) 络合物固定在经菲咯啉修饰的磁性纳米粒子 (MNPs-Phen-Zn(II)) 表面,制备了一种新型绿色纳米磁性锌催化剂。通过FT-IR、SEM、TEM、EDX、XRD、VSM和ICP-OES等一系列光谱技术对MNPs-Phen-Zn(II)纳米材料的结构进行了表征。所得锌纳米磁性催化剂对通过C(sp 2 ) 合成二取代炔烃具有很高的催化活性。)–C(sp) 在环保条件下炔烃与芳基碘化物的交叉偶联反应。据我们所知,这是第一份关于在不添加 Pd 和 Cu 源的情况下使用锌纳米磁性催化剂进行炔烃与芳基碘化物的 Sonogashira 型交叉偶联反应的报道。从市售材料制备催化剂的简单性、优异的化学选择性、易于产物分离、催化剂的直接回收和可重复使用且活性不变,使我们的程序成为一种绿色实用的方法。