Synthesis, characterization, X-ray crystallography analysis, and catalytic activity of bis(2-pyridylmethyl)amine copper complexes containing coupled pendent olefinic arms in atom transfer radical addition (ATRA) reactions
作者:Katherine A. Bussey、Annie R. Cavalier、Margaret E. Mraz、Kayode D. Oshin、Amy Sarjeant、Tomislav Pintauer
DOI:10.1016/j.poly.2015.12.043
日期:2016.8
C group in the olefinic arm of a neighboring complex. This interaction led to augmentation of the C C bond due to back-bonding from the metal center. Five solid state structures were obtained for the copper(II) complexes with two also displaying intermolecular associative bonding between olefinic pendent arms and the metal center. X-ray crystallography studies showed that the olefinic arm motifs incorporated
A new heterogeneous hybrid ruthenium catalyst being an eco-friendly option for the production of polymers and organic intermediates
作者:Bob De Clercq、Fr??d??ric Lefebvre、Francis Verpoort
DOI:10.1039/b202872g
日期:2002.8.22
We succeeded in synthesising and characterising a new heterogeneous hybrid ruthenium catalyst that exhibits excellent stability, reusability and leaching characteristics. The host–guest interaction is studied by XRD, XRF, ICP/MS, BET, FT-Raman and solid state NMR analysis. Moreover, we tested this catalytic system in ring-closing metathesis (RCM), ring-opening metathesis polymerization (ROMP), Kharasch addition, atom transfer radical polymerization (ATRP) and vinylation reactions. The results obtained from these tests show that for ROMP, RCM, Kharasch addition and vinylation reactions the heterogeneous catalyst possesses important advantages in comparison with its homogeneous analogue.
An Efficient, Selective, and Reducing Agent-Free Copper Catalyst for the Atom-Transfer Radical Addition of Halo Compounds to Activated Olefins
作者:José María Muñoz-Molina、Tomás R. Belderraín、Pedro J. Pérez
DOI:10.1021/ic901942p
日期:2010.1.18
Efficient and selective ATRA reactions of CCl4, CBr4, TsCl (Ts = tosyl), or Cl3CCO2Et with activatedolefins (styrene, methyl methacrylate, n-butyl methacrylate, tert-butyl methacrylate) using the TptBuCu(NCMe) complex as a catalyst have been achieved in the absence of any reductant and with low catalyst loadings.
Photoinitiated ambient temperature copper-catalyzed atom transfer radical addition (ATRA) and cyclization (ATRC) reactions in the presence of free-radical diazo initiator (AIBN)
作者:Marielle Nicole C. Balili、Tomislav Pintauer
DOI:10.1039/c0dt01764g
日期:——
monoadduct was obtained in lower yields in the ATRA of less active halogenated compounds, which was mostly due to incomplete alkene conversions. Ambient temperature ATRA of CCl4 to various 1,6-dienes followed by sequential ATRC was also performed in the presence of UV light using [CuII(TPMA)Cl][Cl] complex and AIBN. High yields of the 5-exo-trig cyclic product were obtained for all dienes with preferential
A half-sandwich 1,2-azaborolyl (Ab) ruthenium complex, (Ab–CCPh)RuCl(PPh3)2 (1), has been synthesized by treating RuCl2(PPh3)3 with lithium 1,2-azaborolide L-1, or by treating either RuCl2(PPh3)3 or RuHCl(PPh3)3 directly with 1,2-azaborole LH-1. It is evaluated as a suitable precatalyst in [2 + 2] cycloadditions of norbornene derivatives with DMAD and in atom transfer radical additions of halogenated compounds with olefins.