948-33-4Relevant academic research and scientific papers
Can the Ti(OiPr)4/nBuLi combination of reagents function as a catalyst for [2+2+2] alkyne cyclotrimerisation reactions?
Siemiaszko, Gabriela,Six, Yvan
supporting information, p. 20219 - 20226 (2018/12/13)
Catalysis of the cyclotrimerisation of alkynes with the Ti(OiPr)4/nBuLi system was studied, leading to the development of a particularly convenient and reliable protocol. This method allows the [2+2+2] cycloaddition reaction to proceed within a few minutes under microwave conditions, with generally good selectivity from a variety of aromatic and aliphatic alkynes.
Iron-Catalyzed Cyclotrimerization of Terminal Alkynes by Dual Catalyst Activation in the Absence of Reductants
Brenna, Davide,Villa, Matteo,Gieshoff, Tim N.,Fischer, Fabian,Hapke, Marko,Jacobi von Wangelin, Axel
supporting information, p. 8451 - 8454 (2017/07/11)
Catalyzing C?C bond-forming reactions with earth-abundant metals under mild conditions is at the heart of sustainable synthesis. The cyclotrimerization of alkynes is a valuable atom-efficient reaction in organic synthesis that is enabled by several metal catalysts, including iron. This study reports an effective iron-catalyzed cyclotrimerization for the regioselective synthesis of 1,2,4-substituted arenes (1 mol % catalyst, toluene, 20 °C, 5 min). A dual activation mechanism (substrate deprotonation, reductive elimination) renders the simple FeII precatalyst highly active in the absence of any reductant.
A simple cobalt catalyst system for the efficient and regioselective cyclotrimerisation of alkynes
Hilt, Gerhard,Vogler, Thomas,Hess, Wilfried,Galbiati, Fabrizio
, p. 1474 - 1475 (2007/10/03)
The intermolecular cyclotrimerisation of terminal and internal alkynes can be catalysed by simple cobalt complexes such as a CoBr2(diimine) under mild reaction conditions when treated with zinc and zinc iodide with high regioselectivity in excellent yields. The Royal Society of Chemistry 2005.
STRUCTURAL INVESTIGATION ON SOME TRISISOPROPENYL-BENZENES BY THEORETICAL AND GAS-PHASE UV PHOTOELECTRON SPECTROSCOPIC STUDY
Andoni, E.,Bossa, M.,Carusi, P.,Cauletti, C.,Furlani, A.
, p. 115 - 122 (2007/10/02)
The structure of 1,3,5-trisisopropenylbenzene (I) and 1,2,4-trisiopropenylbenzene (II) was investigated by gas-phase UV photoelectron spectroscopy (UPS) and theoretical (HAM 3) calculations.In the case of compound I we found that the geometrical parameters do not affect appreciably the ordering and spacing of the highest occupied molecular orbitals whereas in II agreement between experimental and calculated IEs was found only for some geometries, characterized also by the lowest total energies.This difference is reflected in the spacing of energy levels in the two molecules.
POLYMERS FROM MONOSUBSTITUTED ACETYLENES
Furlani, Anita,Russo, Maria Vittoria,Carusi, Paola,Licoccia, Silvia,Leoni, Emidio,Valenti, Guido
, p. 671 - 676 (2007/10/02)
The reactivity of bromopropyne, chloropropyne, propargyl alcohol and isopropenylacetylene in the presence of various bisphosphine nickel complexes has been examined.Polymers of bromopropyne, and propargyl alcohol are obtained in the presence of Ni(NCS)2(
