Copper(0) nanoparticle catalyzed
<i>Z</i>
‐Selective Transfer Semihydrogenation of Internal Alkynes
作者:Maria Jesus Moran、Katia Martina、Vidmantas Bieliunas、Francesca Baricco、Silvia Tagliapietra、Gloria Berlier、Wim M. De Borggraeve、Giancarlo Cravotto
DOI:10.1002/adsc.202100126
日期:2021.6.8
The use of copper(0) nanoparticles in the transfer semihydrogenation of alkynes has been investigated as a lead-free alternative to Lindlar catalysts. A stereo-selective methodology for the hydrogenation of internal alkynes to the corresponding (Z)-alkenes in high isolated yields (86% average) has been developed. This green and sustainable transfer hydrogenation protocol relies on non-noble copper
Nucleophilic reactivity. Part VII. The mechanism of hydrolysis of some unsaturated esters of methanesulphonic acid
作者:R. F. Hudson、R. J. Withey
DOI:10.1039/j29660000237
日期:——
4-elimination followed by alkaline hydrolysis at sulphur. The diesters give the substituted products only on reaction with the sodium salts of p-nitrophenol and thiophenol. The mode of activation of sulphonate esters by vinylic and acetylenic groups is briefly discussed.
Alkyl group-tagged ruthenium indenylidene complexes: Synthesis, characterization and metathesis activity
作者:Baoyi Yu、Fatma B. Hamad、Karen Leus、Alex A. Lyapkov、Kristof Van Hecke、Francis Verpoort
DOI:10.1016/j.jorganchem.2015.04.054
日期:2015.8
We report on the synthesis of ruthenium indenylidene catalysts [RuCl2(3-R-1-indenylidene)(PCy3)(2) in which R is iso-propyl (7a), tert-butyl (7b) or cyclohexyl (7c)]. The obtained alkyl tagged indenylidene catalysts were analyzed by means of IR, elemental analysis, NMR and single crystal X-Ray diffraction analysis. Furthermore, the catalytic performance of these new complexes was examined in different metathesis reactions: ring-closing metathesis (RCM), ring-closing ene-yne metathesis (RCEYM), ring-opening metathesis polymerization (ROMP) and cross metathesis (CM), exhibiting a comparable activity in comparison with the commercially available catalyst 3a. (C) 2015 Elsevier B.V. All rights reserved.
Reppe et al., Justus Liebigs Annalen der Chemie, 1955, vol. 596, p. 1,95,131
作者:Reppe et al.
DOI:——
日期:——
AERSSENS, M. H. P. J.;BRANDSMA, L., J. CHEM. SOC. CHEM. COMMUN., 1984, N 12, 735-736