Results 41 to 50 of about 5,480 (191)
Template-Directed Olefin Cross Metathesis
Organic Letters, 2005 [reaction: see text] A template containing two secondary dialkylammonium ion recognition sites for encirclement by olefin-bearing dibenzo[24]crown-8 derivatives has been used to promote olefin cross metatheses with ruthenium-alkylidene catalysts.
Stuart J, Cantrill +8 more
openaire +4 more sources
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
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
Beilstein Journal of Organic Chemistry, 2021 This work presents an examination of the selective functionalization of norbornadiene through nitrile oxide 1,3-dipolar cycloaddition/ring-opening metathesis (ROM)/cross-metathesis (CM) protocols. Functionalization of commercially available norbornadiene
Zsanett Benke +2 more
doaj +1 more source
Advanced Optical Materials, EarlyView.Associating a chiral bent core liquid crystal molecule, that self‐assembles into helical nanofilaments, with an achiral red‐NIR phosphorescent octahedral molybdenum cluster produces a hybrid material exhibiting efficient red‐NIR circularly polarized emission under UV excitation.
Jeanne Rebours +6 more
wiley +1 more source
Computational study of productive and non-productive cycles in fluoroalkene metathesis
Beilstein Journal of Organic Chemistry, 2015 A detailed DFT study of the mechanism of metathesis of fluoroethene, 1-fluoroethene, 1,1-difluoroethene, cis- and trans-1,2-difluoroethene, tetrafluoroethene and chlorotrifluoroethene catalysed with the Hoveyda–Grubbs 2nd generation catalyst was ...
Markéta Rybáčková +4 more
doaj +1 more source
Advanced Science, EarlyView.A new data‐efficient framework combining DFT calculations, a neural network model, and automated graph analysis of catalytic reaction networks is proposed and applied to CO2 hydrogenation on transition metal nanoparticles. The analysis shows how efficient C2 oxygenate production requires a balance between CHx formation, C–C coupling, protonation, and ...
Mikhail V. Polynski, Sergey M. Kozlov
wiley +1 more source
Total synthesis of the indolizidine alkaloid tashiromine
Beilstein Journal of Organic Chemistry, 2008 BackgroundTashiromine (1) is a naturally occurring indolizidine alkaloid. It has been the subject of thirteen successful total syntheses to date. Our own approach centres on the stereoselective construction of the indolizidine core by capture of an ...
Stephen P. Marsden, Alison D. McElhinney
doaj +1 more source
Synthetic Approaches to Diospongins: A Two Decade Journey
SynOpen, 2022 Tetrahydropyran units having multiple stereogenic centers serve as excellent building blocks for various active pharmaceutical ingredients (APIs). In particular, the presence of the unique molecular architecture of the trisubstituted tetrahydropyran (THP)
Krishnaji Tadiparthi, Sourav Chatterjee
doaj +1 more source
Beilstein Journal of Organic Chemistry, 2015 A silver-free methodology was developed for the synthesis of unprecedented N-heterocyclic carbene ruthenium indenylidene complexes bearing a bidentate picolinate ligand.
Thibault E. Schmid +6 more
doaj +1 more source