Results 31 to 40 of about 4,073,255 (239)

Synthesis of Substituted P-Stereogenic Vinylphosphine Oxides by Olefin Cross-Metathesis

, 2016
Substituted vinylphosphine oxides have been prepared in good yield and exclusive (E)-olefin selectivity via olefin cross-metathesis using Grubbs and Hoveyda-type ruthenium catalysts.
K. Michał Pietrusiewicz (1676410), Karol Grela (1478173), Oleg M. Demchuk (3067341), Anna Michrowska (2524744)   +3 more
core   +1 more source

Design of Giant Negative Thermal Expansion Based on a Fluorite Structure

Angewandte Chemie, EarlyView.
Ba[B(CN)4]2 with a fluorite structure possessing a large average atomic volume was successfully synthesized for the first time. In situ powder X‐ray diffraction measurements revealed that Ba[B(CN)4]2 exhibits giant negative thermal expansion (NTE) behavior through non‐rigid unit modes with strongly negative Grüneisen parameters.
Ayano Umakoshi, Takuo Minato, Akira Miura, Tom Ichibha, Ryo Maezono, Masahiro Sadakane   +5 more
wiley   +2 more sources

Concise Total Synthesis of (+)-Brefeldin A:  A Combined β-Lactone/Cross-Metathesis-Based Strategy

, 2016
A highly convergent total synthesis of (+)-brefeldin A that relies on a diastereoselective, β-lactone-based cyclopentane synthesis combined with complex cross-metathesis reactions is described.
Daniel Romo (246583), Yingcai Wang (1765270)   +1 more
core   +1 more source

Olefin metathesis in nano-sized systems

Beilstein Journal of Organic Chemistry, 2011
The interplay between olefin metathesis and dendrimers and other nano systems is addressed in this mini review mostly based on the authors’ own contributions over the last decade.
Didier Astruc, Abdou K. Diallo, Sylvain Gatard, Liyuan Liang, Cátia Ornelas, Victor Martinez, Denise Méry, Jaime Ruiz   +7 more
doaj   +1 more source

A Ruthenium(CAAC-5) Olefin Metathesis Catalyst for Bioconjugation. [PDF]

Angew Chem Int Ed Engl
The aqueous instability of ruthenium catalysts restricts olefin metathesis in biological media. A Ru(CAAC‐5) complex bearing an aniline handle is reported that remains active under biologically relevant conditions and enables bioconjugation to proteins, peptides, and an artificial metalloenzyme, providing a robust platform for olefin metathesis in ...
Graf DA, Boym M, Álvarez M, Kardashliev T, Ward TR.   +4 more
europepmc   +2 more sources

Functionalized Polymers from Ring-Opening Metathesis Polymerization Through Monomer Design [PDF]

, 2009
The focus of the research presented in this thesis deals with the synthesis and development of functionalized polymers using ring-opening metathesis polymerization (ROMP).
Walker, Ron
core   +1 more source

Z‐Retentive Enantioselective Rh‐Catalyzed Hydroarylation of E,Z‐Dienes

Angewandte Chemie, EarlyView.
The Rh‐catalyzed hydroarylation of conjugated E,Z‐dienoates is found to proceed with high selectivity for addition to the E‐alkene unit. Mechanistic analysis of this Z‐retentive process points towards preferred binding of the E‐alkene unit to a Rh‐aryl species to give rise to the observed selectivity and that Rh‐enolate protonolysis to be turnover ...
Wesley McNutt, Hima Kozhummal, Abdullah Al‐Mashqbeh, Alex Brown, Rylan J. Lundgren   +4 more
wiley   +2 more sources

Efficient catalytic alkyne metathesis with a fluoroalkoxy-supported ditungsten(III) complex

Beilstein Journal of Organic Chemistry, 2018
The molybdenum and tungsten complexes M2(OR)6 (Mo2F6, M = Mo, R = C(CF3)2Me; W2F3, M = W, R = OC(CF3)Me2) were synthesized as bimetallic congeners of the highly active alkyne metathesis catalysts [MesC≡M{OC(CF3)nMe3−n}] (MoF6, M = Mo, n = 2; WF3, M = W ...
Henrike Ehrhorn, Janin Schlösser, Dirk Bockfeld, Matthias Tamm   +3 more
doaj   +1 more source

Highly efficient conversion of plant oil to bio-aviation fuel and valuable chemicals by combination of enzymatic transesterification, olefin cross-metathesis, and hydrotreating

Biotechnology for Biofuels, 2018
Background The production of fuels and chemicals from renewable resources is increasingly important due to the environmental concern and depletion of fossil fuel. Despite the fast technical development in the production of aviation fuels, there are still
Meng Wang, Mojin Chen, Yunming Fang, Tianwei Tan   +3 more
doaj   +1 more source

Two‐Way Shape Memory Polymer Composite Gripper for Adaptive Robotic Applications

Advanced Materials Technologies, EarlyView.
A two‐way shape memory polymer (SMP) composite is developed with intrinsic shape‐changing capability driven solely by temperature, eliminating external actuation loads. Embedding the SMP in a low‐stiffness elastomeric matrix enabled reversible transformations during heating and cooling cycles.
Aamna Hameed, Kamran Ahmed Khan
wiley   +1 more source