scholarly journals Olefin Metathesis with Ru-Based Catalysts Exchanging the Typical N-Heterocyclic Carbenes by a Phosphine–Phosphonium Ylide

Catalysts ◽  
2017 ◽  
Vol 7 (12) ◽  
pp. 85 ◽  
Author(s):  
Laia Arnedo ◽  
Remi Chauvin ◽  
Albert Poater
Keyword(s):  
Olefin Metathesis ◽  
Heterocyclic Carbenes

Nitrenium ions and trivalent boron ligands as analogues of N-heterocyclic carbenes in olefin metathesis: a computational study

2015 ◽  
Vol 44 (46) ◽  
pp. 20021-20026 ◽  
Author(s):  
A. Pazio ◽  
K. Woźniak ◽  
K. Grela ◽  
B. Trzaskowski
Keyword(s):  
Olefin Metathesis ◽  
Computational Study ◽  
Heterocyclic Carbenes ◽  
Mechanistic Study ◽  
Nitrenium Ions ◽  
Nitrenium Ion ◽  
Metathesis Catalysts

A DFT mechanistic study reveals that nitrenium ion-modified Hoveyda-like complexes are good candidates for latent metathesis catalysts, while boron-modified systems are candidates for very fast metathesis catalysts.

scholarly journals Activation of olefin metathesis complexes containing unsymmetrical unsaturated N-heterocyclic carbenes by copper and gold transmetalation

2019 ◽  
Vol 55 (77) ◽  
pp. 11583-11586 ◽  
Author(s):  
Fadwa Kamal ◽  
Sophie Colombel-Rouen ◽  
Adrien Dumas ◽  
Jean-Paul Guégan ◽  
Thierry Roisnel ◽  
...  
Keyword(s):  
Olefin Metathesis ◽  
Ruthenium Complexes ◽  
Heterocyclic Carbenes

The activation of latent ruthenium complexes containing two unsymmetrical NHCs by copper and gold transmetalation leads to impressive initiation rates in olefin metathesis.

In Silico Olefin Metathesis with Ru-Based Catalysts Containing N-Heterocyclic Carbenes Bearing C60 Fullerenes

2016 ◽  
Vol 22 (19) ◽  
pp. 6617-6623 ◽  
Author(s):  
Juan Pablo Martínez ◽  
Sai Vikrama Chaitanya Vummaleti ◽  
Laura Falivene ◽  
Steven P. Nolan ◽  
Luigi Cavallo ◽  
...  
Keyword(s):  
In Silico ◽  
Olefin Metathesis ◽  
Heterocyclic Carbenes ◽  
C60 Fullerenes

Reactivity of Grubbs–Hoveyda II Complexes Including Extended N-Heterocyclic Carbenes with a Bicyclic Camphor-Based Framework

Synthesis ◽  
2017 ◽  
Vol 49 (13) ◽  
pp. 2852-2864 ◽  
Author(s):  
René Wilhelm ◽  
Eduard Rais ◽  
Ulrich Flörke
Keyword(s):  
High Activity ◽  
Olefin Metathesis ◽  
Heterocyclic Carbenes ◽  
Short Route ◽  
Feature Article ◽  
Metathesis Reactions

This feature article discusses the synthesis of new asymmetric Grubbs–Hoveyda II complexes with extended N-heterocyclic carbenes containing a bicyclic camphor-based framework. The new enantiopure complexes can be prepared in a short route from the chiral pool. The extended carbene-based catalyst shows high activity in olefin metathesis reactions. The new complexes exhibited enantioselectivity in an asymmetric ROCM desymmetrization. Depending on the substituents on the nitrogen atoms of the carbenes, the opposite enantiomer was formed in excess.

New olefin metathesis catalysts bearing polyether clamp in N-heterocyclic carbenes ligands

Tetrahedron ◽  
2014 ◽  
Vol 70 (38) ◽  
pp. 6810-6816 ◽  
Author(s):  
Agnieszka Hryniewicka ◽  
Iwona Misztalewska ◽  
Dorota Czajkowska-Szczykowska ◽  
Zofia Urbańczyk-Lipkowska ◽  
Jacek W. Morzycki ◽  
...  
Keyword(s):  
Olefin Metathesis ◽  
Heterocyclic Carbenes ◽  
Metathesis Catalysts

Ruthenium olefin metathesis catalysts featuring unsymmetrical N-heterocyclic carbenes

2016 ◽  
Vol 45 (2) ◽  
pp. 561-571 ◽  
Author(s):  
Veronica Paradiso ◽  
Valerio Bertolasi ◽  
Chiara Costabile ◽  
Fabia Grisi
Keyword(s):  
Alkyl Group ◽  
Olefin Metathesis ◽  
Second Generation ◽  
Ruthenium Catalysts ◽  
Heterocyclic Carbenes ◽  
Metathesis Catalysts

New second generation ruthenium catalysts bearing unsymmetrical NHCs show different catalytic efficiencies depending on the size of the N-alkyl group (methyl or cyclohexyl) and on the backbone configuration.

Hoveyda–Grubbs-Type Precatalysts with UnsymmetricalN-Heterocyclic Carbenes as Effective Catalysts in Olefin Metathesis

2017 ◽  
Vol 36 (11) ◽  
pp. 2153-2166 ◽  
Author(s):  
Paweł Małecki ◽  
Katarzyna Gajda ◽  
Osman Ablialimov ◽  
Maura Malińska ◽  
Roman Gajda ◽  
...  
Keyword(s):  
Olefin Metathesis ◽  
Heterocyclic Carbenes
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