Results 101 to 110 of about 20,349 (227)
Thermally Bistable Stiff Stilbene Photoswitches and Polymer Applications
The Chemical Record, EarlyView.Thermally stable photoswitches offer new opportunities for controlling polymer structures and functions under nonequilibrium conditions. This Personal Account highlights stiff stilbene (SS) and sterically hindered stiff stilbene (HSS) photoswitches, which combine large structural changes with exceptional thermal bistability.
Keiichi Imato
wiley +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
Straightforward Synthesis of α,β-Unsaturated Thioesters via Ruthenium-Catalyzed Olefin Cross-Metathesis with Thioacrylate [PDF]
, 2008 The cross-metathesis reaction of S-ethyl thioacrylate with a variety of olefins is effectively catalyzed by using a ruthenium benzylidene olefin metathesis catalyst.
Feringa, Ben L., +2 more
core +1 more source
Stimuli‐Responsive Poly(Disulfide)s: A Versatile Platform for Intelligent Drug Delivery Systems
MedComm – Biomaterials and Applications, Volume 5, Issue 2, June 2026.Ring‐opening polymerization based on dynamic disulfide bond exchange is an important method for synthesizing poly(disulfide)s. These polymers possess stimulus‐responsive mechanisms and show broad prospects in intelligent drug delivery. This review systematically discusses the ring‐opening polymerization strategy and research progress of drug delivery ...
Yuechen He +7 more
wiley +1 more source
Revisit to ()-Civetone Synthesis
Natural Product Communications, 2012 The synthesis of ( Z )-civetone ( 1 ) is described starting from oleic acid ( 5 ) via a series of reactions, intermolecular olefin self-metathesis, bromination/dehydrobromination into acetylene, semi-hydrogenation and intramolecular Dieckmann ...
Hisahiro Hagiwara +4 more
doaj +1 more source
A bis-calixarene from olefin metathesis
Acta Crystallographica Section E, 2012 A ring-closing olefin metathesis reaction of tetrakis(allyloxy)calix[4]arene gave the bis calixarene, (15E,40E,60E)-65,74-bis(prop-2-en-1-yloxy)-13,18,38,43,58,63-hexaoxadodecacyclo[28.26.8.720,36.111,45.151,55.05,57.07,12.019,24.026,64.032,37.044,49.168,
Shimelis T. Hailu +3 more
doaj +1 more source
A Standard System of Characterization for Olefin Metathesis Catalysts [PDF]
, 2006 The success of olefin metathesis has spurred the intense investigation of new catalysts for this transformation. With the development of many different catalysts, however, it becomes increasingly difficult to compare their efficiencies.
Funk, Timothy W. +4 more
core +1 more source
European Journal of Organic Chemistry, Volume 29, Issue 17, 5 May 2026.The conformational rate processes that influence the NMR spectra of the ten‐membered lactone (–)‐nonenolide are elucidated using VT‐NMR, QM calculations and MD simulations. Reorientation of the alkene moiety with respect to the ring is identified as the slow exchange process.
Ingso Limbu +5 more
wiley +1 more source
Total Synthesis of the Spirocyclic Bis‐Indole Alkaloid (−)‐Owerreine via a [4+2] Annulation
Angewandte Chemie, Volume 138, Issue 17, 20 April 2026.The total synthesis of the bis‐indole alkaloid (−)‐owerreine has been accomplished by a diastereoselective [4+2] annulation between an enamine and an α,β−unsaturated indolenine precursor to form the 3‐spirocyclic tetrahydropyridine linkage of the natural product. DFT calculations allow an understanding of the mechanism of the key annulation.
Elisa Coll +4 more
wiley +2 more sources
Beilstein Journal of Organic Chemistry, 2019 The influence of microwave and ultrasonic irradiation on the performance of ammonium-tagged Ru-based catalysts in olefin metathesis transformations in aqueous media was studied.
Łukasz Gułajski +5 more
doaj +1 more source