Synthesis, structure and catalytic properties of [Ru(dppp)<sub>2</sub>(CH<sub>3</sub>CN)Cl][BPh<sub>4</sub>] and isolation of catalytically active [Ru(dppp)<sub>2</sub>Cl][BPh<sub>4</sub>]: ruthenium catalysed alkyne homocoupling and tandem alkyne–azide cycloaddition
作者:Uttam Kumar Das、Rajesh K. Jena、Manish Bhattacharjee
DOI:10.1039/c4ra01411a
日期:——
The complex, [Ru(dppp)2(CH3CN)Cl][BPh4] catalyses coupling of alkynes and subsequent alkyne–azide cycloaddition reaction.
Synthesis of 1,3‐Diynes Using Calcium Carbide as an Alkyne Source
作者:Zhenrong Liu、Zheng Li
DOI:10.1002/ejoc.202001324
日期:2021.1.15
As a surrogate of gaseous acetylene, calcium carbide can be directly used as an easy‐to‐handle alkyne source for the synthesis of 1,3‐diynes under mild conditions using air as oxidant.
Highly Efficient Cycloaddition Reaction of 1,3-Diynes with Sodium Azide: A New Way to 5-Substituted-4-acetylene-1<i>H</i>-1,2,3-triazoles
作者:Jia-Liang Tang、Ling Ming、Xiao-Ming Zhao
DOI:10.1002/jhet.1950
日期:2016.9
A cycloaddition reaction of a range of 1,3‐diynes with sodium azide has been realized, which provided 5‐substituted‐4‐acetylene‐1H‐1,2,3‐triazoles in 75–99% yields. The chemical structures of the new compounds 3 are established by IR, NMR, Mass, and HRMS.
已经实现了一系列1,3-二炔与叠氮化钠的环加成反应,该反应以75-99%的产率提供了5-取代的-4-乙炔-1 H -1,2,3-三唑。通过IR,NMR,Mass和HRMS确定新化合物3的化学结构。
Synthetic Access to 1,3-Butadiynes via Electro-redox Cuprous-Catalyzed Dehydrogenative Csp–Csp Homocoupling of Terminal Acetylenes
cuprous catalysis. The scope of this protocol was established by preparing an array of structurally and electronically different 1,3-butadiyne derivatives. Good synthetic yields, functional group tolerance, oxidant-free conditions, and no cross-selectivity are some of the intrinsic advantages of this methodology. The developed chemistry features the electro-redox formation of copperacetylide, an intermediate
在此,我们公开了在电化学产生的亚铜催化下末端炔烃的氧化自偶联。该协议的范围是通过制备一系列结构和电子不同的 1,3-丁二炔衍生物来确定的。良好的合成产率、官能团耐受性、无氧化剂条件和无交叉选择性是该方法的一些固有优势。所开发的化学反应以电氧化还原形成乙炔铜为特征,乙炔铜是一种适合 C sp -C sp偶联步骤的中间体。通过点击捕获实验、循环伏安法、EPR 光谱和 XPS 证实,乙炔化物中间体中铜的化学态为 Cu(I)。确定电子不同乙炔的反应性的竞争反应表明,产物比率相当依赖于炔基取代基的电子性质。为了突出产品的合成价值,对选定的二炔进行了化学多样化。
[Cu]-catalyzed direct coupling of dibromoalkenes: Synthesis of symmetrical 1,3-diynes and triazoles
ABSTRACT An efficient [Cu]-catalyzedhomocoupling of 1,1-dibromoalk-1-enes is described for the synthesis of symmetrical 1,3-diyines. The method showed good substrate scope and amenable to aryl and heteroaryl systems. Significantly, the strategy was also successfully applied to the sequential one-pot synthesis of triazoles. GRAPHICAL ABSTRACT