Results 81 to 90 of about 66,905 (286)
Synthesis of Conjugated Linear and Cyclic Polyynes by Selective Alkyne Metathesis. [PDF]
Angew Chem Int Ed EnglThe formation of polyynes with an odd number of conjugated triple bonds is challenging, particularly for complex architectures since most established methods rely on irreversible C–C bond‐forming reactions. To address this, we have developed the synthesis of triynes via alkyne metathesis.
Escudero J +12 more
europepmc +3 more sources
Metathesis Reactions of Carbohydrates: Recent Highlights in Cross‐Metathesis
European Journal of Organic Chemistry, 2010 AbstractMetathetical processes play a prominent role in the development of useful transformations because of their mildness, tolerance of functional groups, and synthetic potential. On the other hand, carbohydrates have gained well‐deserved relevance in the study of biological processes.
Aljarilla, Ana +2 more
openaire +2 more sources
Bidentate N,O-prolinate ruthenium benzylidene catalyst highly active in RCM of disubstituted dienes [PDF]
, 2007 The synthesis of a bidentate N,O-prolinate ruthenium benzylidene from commercially available starting materials and its activity in ring-closing metathesis of functionalized disubstituted dienes at 30 °C is ...
Grubbs, Robert H., Samec, Joseph S. M.
core +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
First Total Synthesis of Cryptopyranmoscatone A3 and Cryptopyranmoscatone B4
SynOpen, 2018 The first total synthesis of cryptopyranmoscatones A3 and B4 has been accomplished from d-ribose or but-3-ynol. The key steps involved in the synthesis are oxa-Michael addition, highly diastereoselective Brown allylation, and ring closing metathesis ...
A. Maheswara Reddy, Gowravaram Sabitha
doaj +1 more source
Olefin metathesis in multiblock copolymer synthesis
Beilstein Journal of Organic Chemistry, 2019 Multiblock copolymers constitute a basis for an emerging class of nanomaterials that combine various functional properties with durability and enhanced mechanical characteristics. Our mini-review addresses synthetic approaches to the design of multiblock
Maria L. Gringolts +3 more
doaj +1 more source
Functionalized hyperbranched polymers via olefin metathesis [PDF]
, 2009 Hyperbranched polymers are highly branched, three-dimensional macromolecules which are closely related to dendrimers and are typically prepared via a one-pot polycondensation of AB_(n≥2) monomers.^1 Although hyperbranched macromolecules lack the ...
Gorodetskaya, Irina A. +3 more
core +1 more source
Conformations of N-Heterocyclic Carbene Ligands in Ruthenium Complexes Relevant to Olefin Metathesis [PDF]
, 2009 The structure of ruthenium-based olefin metathesis catalyst 3 and model π-complex 5 in solution and in the solid state are reported. The N-tolyl ligands, due to their lower symmetry than the traditional N-mesityl substituents, complicate this analysis ...
Benitez, Diego +6 more
core +3 more sources
Cyclization Strategies in Carbonyl–Olefin Metathesis: An Up-to-Date Review
MoleculesThe metathesis reaction between carbonyl compounds and olefins has emerged as a potent strategy for facilitating swift functional group interconversion and the construction of intricate organic structures through the creation of novel carbon–carbon ...
Xiaoke Zhang
doaj +1 more source
Formation of bridged bicycloalkenes via ring closing metathesis [PDF]
, 1998 Ring closing metathesis may be used in the formation of small ring bicycloalkenes from monocyclic diene ...
Grubbs, Robert H., Morehead, Andrew, Jr.
core +1 more source