Results 51 to 60 of about 4,393 (185)

Synthesis of a Carbon‐Linked Acyldepsipeptide Derivative

European Journal of Organic Chemistry, EarlyView.
The synthesis of a methylene‐linked acyldepsipeptide (ADEP) is reported. Success relied upon an improve method to generate a versatile vinyl glycine methyl ester synthon and a rationally optimized Grubb’s metathesis. NMR and in silico studies revealed an unusual trans–trans proline orientation for this new unnatural ADEP analog, advancing the ...
Katelyn G. Stevens-Davis, Xiaozheng Dou, Bo Hu, Yangxiong Li, Jiayuan Miao, Yu-Shan Lin, Adam S. Duerfeldt   +6 more
wiley   +1 more source

Olefin Metathesis. IV.

Journal of Japan Oil Chemists' Society, 1976
The metathesis of methyl oleate with the WCl6-cocatalyst system was investigated. Tetra-n-butyl-stannane, tetraethylstannane and triethylaluminum were effective as cocatalysts. The optimum reaction condition was considerably different from that for the metathesis of internal alkene having no functional group.
Kazuaki ICHIKAWA, Kazuo FUKUZUMI
openaire   +2 more sources

Mapping Alkyne Chemical Space—Classifying the Reactivity of Alkynes in Semihydrogenation and beyond Using a Data Science Framework

Helvetica Chimica Acta, EarlyView.
A data science framework integrating DFT featurization and hierarchical clustering was used to map the chemical space of over 2700 alkynes into six subsets before using experimental data for Ni3Zn‐catalyzed semihydrogenation and applying a logistic regression model to categorize substrates by reactivity.
Jordan De Jesus Silva, Scott R. Docherty, Jasper Clarysse, Maksym Yarema, Vanessa Wood, Christophe Copéret   +5 more
wiley   +1 more source

Olefin Metathesis Reaction in Water and in Air Improved by Supramolecular Additives

Molecules, 2015
A range of water-immiscible commercially available Grubbs-type precatalysts can be used in ring-closing olefin metathesis reaction in high yields. The synthetic transformation is possible in pure water under ambient conditions.
Jasmine Tomasek, Miriam Seßler, Harald Gröger, Jürgen Schatz   +3 more
doaj   +1 more source

Olefin Metathesis. I.

Journal of Japan Oil Chemists' Society, 1975
The homogeneous olefin metathesis of 2-heptene with a catalyst system of WCl6-Bu4Sn was investigated. The optimum ratios of Bu4Sn to WCl6 were in the wide range of 1.02.0, and the Friedel-Crafts products were less than 3% when the ratios were more than 1.0.
Toru TAKAGI, Kazuaki ICHIKAWA, Tetsuo HAMAGUCHI, Kazuo FUKUZUMI, Masahiro AOYAMA   +4 more
openaire   +2 more sources

Biobased Epoxidized Castor Oil Covalent Adaptable Networks Adhesives Reinforced with Recycled Carbon Fibers

Macromolecular Rapid Communications, EarlyView.
It is reported the design of biobased sustainable, smart, and functional adhesives achieved dispersing recycled carbon fibers into biobased epoxy monomer. ABSTRACT The development of sustainable, smart, and functional adhesives is crucial in advancing environmentally friendly materials.
Alberto Cellai, Rafael Turra Alarcon, Bernhard Sölle, Elisabeth Rossegger, Valentina Casalegno, Milena Salvo, Marco Sangermano   +6 more
wiley   +1 more source

Mechanically Triggered Chemical Recyclable Polyethylene‐Like Materials

Angewandte Chemie, Volume 138, Issue 11, 9 March 2026.
Polyethylene‐like copolymers with benchmark properties are prepared by embedding latent cyclobutene mechanophores to overcome PE's end‐of‐life limits. The mechanophores are inert in service but are selectively opened by solvent‐free ball milling to yield well‐defined telechelic oligomers.
Menghe Xu, Peng Liu, Changle Chen, Tae‐Lim Choi   +3 more
wiley   +2 more sources

Metathesis‐Sourced Epoxides in Ring‐Opening Copolymerization: Selective Access to Degradable Polythioesters

Macromolecular Rapid Communications, EarlyView.
Metathesis‐derived cyclopentene epoxides enable strictly alternating, scrambling‐free ring‐opening copolymerization with phthalic thioanhydride, yielding well‐defined polythioesters with molecular weights up to ∼38 kg/mol. Their performance extends to oxygen‐based anhydrides and selective terpolymerizations. Direct comparisons with all‐oxygen analogues
Niracha Tangyen, Bhargav R. Manjunatha, Valerio D'Elia, Alex J. Plajer   +3 more
wiley   +1 more source

Metathesis access to monocyclic iminocyclitol-based therapeutic agents

Beilstein Journal of Organic Chemistry, 2011
By focusing on recent developments on natural and non-natural azasugars (iminocyclitols), this review bolsters the case for the role of olefin metathesis reactions (RCM, CM) as key transformations in the multistep syntheses of pyrrolidine-, piperidine ...
Ileana Dragutan, Valerian Dragutan, Carmen Mitan, Hermanus C.M. Vosloo, Lionel Delaude, Albert Demonceau   +5 more
doaj   +1 more source

2,3‐Dichloro‐5,6‐Dicyano‐1,4‐Benzoquinone (DDQ)‐Mediated CC Bond Formation: Redox Strategies from Stoichiometric to Catalytic Systems

ChemistryOpen, EarlyView.
2,3‐Dichloro‐5,6‐dicyano‐1,4‐benzoquinone serves as a versatile oxidant and redox catalyst for CC bond formation through hydride abstraction or single‐electron transfer. Stoichiometric and catalytic systems enable benzylic, allylic, and aromatic CH activation under mild, metal‐free conditions, providing sustainable routes to complex and bioactive ...
Dohoon Cha, Sun‐Joon Min
wiley   +1 more source