Conversion of Alkyl- and Arylallenes into 1-Alkynes Through Metallated Intermediates
作者:F. Taherirastgar、L. Brandsma
DOI:10.1080/00397919708005448
日期:1997.12
Abstract: A number of acetylenes RCH2C=CH have been obtained by metallation of the allenes RCH=C=CH2 or mixtures of acetylenes and allenes with n-BuLi in THF-hexane and hydrolysis after allowing the metallated allenes to rearrange at room temperature or by heating under reflux.
Synthesis of Allenes via Nickel-Catalyzed Cross-Coupling Reaction of Propargylic Bromides with Grignard Reagents
作者:Qinghan Li、Hanmou Gau
DOI:10.1055/s-0031-1290365
日期:2012.3
method for the synthesis of terminal allenes from cross-coupling of propargylic bromide with Grignardreagent. The reaction of propargylic bromide with 1.2 equivalents of Grignardreagent mediated by Ni(acac)2 (2 mol%) and Ph3P (4 mol%) in THF may produce terminal allenes in good yields and high regioselectivities at room temperature. allenes - nickel - propargylic bromide - Grignardreagent - cross-coupling
Green Synthesis of 3‐Alkylidenefuran‐2‐ones by Palladium‐Catalyzed Cyclocarbonylation of Aryl Iodides with Benzyl Acetylenes in 2‐MeTHF
作者:Jianan Zhan、Junmin Chen、Li Wei、Mingzhong Cai
DOI:10.1002/ejoc.202301152
日期:2024.1.22
A general, efficient and practical method for the synthesis of 3-alkylidenefuran-2-ones has been developed from readily accessible aryl iodides and benzyl acetylenes via a recyclable palladium-catalyzedcarbonylative coupling reaction in a green solvent 2-MeTHF. The reaction proceeds smoothly under a CO atmosphere and mild conditions, yielding a wide range of furanones in good to excellent yields.
通过在绿色溶剂 2-MeTHF 中进行可回收的钯催化的羰基化偶联反应,由易于获得的芳基碘和苄基乙炔开发了一种通用、有效且实用的合成 3-亚烷基呋喃-2-酮的方法。反应在 CO 气氛和温和条件下顺利进行,以良好到优异的收率产生各种呋喃酮。
Preparation of Thiolate-Bridged Dinuclear Ruthenium Complexes Bearing a Phosphine Ligand and Application to Propargylic Reduction of Propargylic Alcohols with 2-Propanol
Novelthiolate-bridged dinuclear ruthenium complexes bearing a phosphine ligand, [Cp*RuPhP(C6H4-o-S)2}RuCp*](OTf)2, [CpRuPhP(C6H4-o-S)2}RuCp*(OH2)](OTf)2, and [Cp*FePhP(C6H4-o-S)2}RuCp*](OTf)2, are prepared and characterized by X-ray analysis. These dinuclear complexes work as effective catalysts toward propargylic reduction of propargylic alcohols with 2-propanol viaallenylidenecomplexes as key
新颖硫醇盐桥联的双核钌络合物轴承膦配体,混合[Cp *茹比索(C 6 H ^ 4 - ö -S)2 } RuCp *](OTF)2,[CPRU比索(C 6 H ^ 4 - ö - S)2 } RuCp *(OH 2)](OTf)2和[Cp * Fe PhP(C 6 H 4 - o -S)2 } RuCp *](OTf)2通过X射线分析制备和表征。这些双核络合物作为有效的催化剂,通过烯基亚烷基络合物作为关键中间体,以2-丙醇进行炔丙醇的炔丙基还原,以高至高收率得到相应的炔烃。