Results 51 to 60 of about 5,480 (191)
Imidazole Backbone Functionalization with Olefin Cross‐Metathesis
European Journal of Organic Chemistry, 2022 AbstractA selective and high‐rate Ru‐catalyzed cross‐metathesis reaction of alkenes with vinylimidazole is disclosed. Cross‐metathesis is known to operate less efficiently on N‐heterocycles, but through optimization by means of statistical experimental design and multiple regression, optimal reaction conditions were identified that allowed for ...
Francesco Angelucci +2 more
openaire +3 more sources
Light-induced olefin metathesis
Beilstein Journal of Organic Chemistry, 2010 Light activation is a most desirable property for catalysis control. Among the many catalytic processes that may be activated by light, olefin metathesis stands out as both academically motivating and practically useful.
Yuval Vidavsky, N. Gabriel Lemcoff
doaj +1 more source
Beilstein Journal of Organic Chemistry, 2010 Seven novel Hoveyda–Grubbs precatalysts bearing an aminosulfonyl function are reported. Kinetic studies indicate an activity enhancement compared to Hoveyda’s precatalyst.
Etienne Borré +3 more
doaj +1 more source
A Short and Efficient Total Synthesis of Ficuseptamines A and B
Molecules, 2018 A rapid and efficient total synthesis of ficuseptamines A and B by a cross metathesis strategy is described.
Hani Mutlak A. Hassan
doaj +1 more source
Angewandte Chemie International Edition, EarlyView.In many Pd‐catalyzed cross‐couplings, catalyst performance has been found to be limited by catalyst activation. Methylnaphthyl (MeNAP) palladium trifluoroacetate dimers are presented as easy‐to‐store and easy‐to‐handle precursors, which rapidly activate under reaction conditions, even when only weakly coordinating, non‐reducing nucleophiles are present.
Sourav Manna +6 more
wiley +1 more source
Ene–yne cross-metathesis with ruthenium carbene catalysts
Beilstein Journal of Organic Chemistry, 2011 Conjugated 1,3-dienes are important building blocks in organic and polymer chemistry. Enyne metathesis is a powerful catalytic reaction to access such structural domains.
Cédric Fischmeister, Christian Bruneau
doaj +1 more source
Concise Synthesis of Broussonone A
Molecules, 2015 A concise and expeditious approach to the total synthesis of broussonone A, a p-quinol natural compound, has been developed. The key features of the synthesis include the Grubbs II catalyst mediated cross metathesis of two aromatic subunits, and a ...
Hyeju Jo +11 more
doaj +1 more source
Late‐Stage Functionalization of Peptides on the Solid Phase
Angewandte Chemie International Edition, EarlyView.Peptide modifications are essential to control pharmacodynamic and pharmacokinetic properties of peptide drugs. Consequently, strategies that allow for efficient and rapid incorporation of non‐canonical modifications into peptides in parallel formats are highly sought after.
Marius Werner +2 more
wiley +1 more source
Beilstein Journal of Organic Chemistry, 2015 Iodide-containing nitro-Grela-type catalysts have been synthesized and applied to ring closing metathesis (RCM) and cross metathesis (CM) reactions. These new catalysts have exhibited improved efficiency in the transformation of sterically, non-demanding
Andrzej Tracz +3 more
doaj +1 more source
MoO3 on zeolites MCM-22, MCM-56 and 2D-MFI as catalysts for 1-octene metathesis
Beilstein Journal of Organic Chemistry, 2018 Highly active olefin metathesis catalysts were prepared by thermal spreading MoO3 and/or MoO2(acac)2 on MWW zeolites (MCM-22, delaminated MCM-56) and on two-dimensional MFI (all in NH4+ form).
Hynek Balcar +3 more
doaj +1 more source