Results 41 to 50 of about 35,734 (288)

Synthesis of skeletally diverse alkaloid-like molecules: exploitation of metathesis substrates assembled from triplets of building blocks

Beilstein Journal of Organic Chemistry, 2013
A range of metathesis substrates was assembled from triplets of unsaturated building blocks. The approach involved the iterative attachment of a propagating and a terminating building block to a fluorous-tagged initiating building block.
Sushil K. Maurya, Mark Dow, Stuart Warriner, Adam Nelson   +3 more
doaj   +1 more source

Ruthenium indenylidene "1st generation" olefin metathesis catalysts containing triisopropyl phosphite

, 2015
The authors gratefully acknowledge the Royal Society (University Research Fellowship to CSJC) and the EC (CP-FP 211468-2 EUMET) for funding.The reaction of triisopropyl phosphite with phosphine-based indenylidene pre-catalysts affords “1st generation ...
Cazin, Catherine, Stefano Guidone, Slawin, Alexandra MZ, Slawin, Alexandra Martha Zoya, Nahra, Fady, Cazin, Catherine S.J., Guidone, Stefano, Catherine S. J. Cazin, Fady Nahra, Alexandra M. Z. Slawin   +9 more
core   +1 more source

Universal promotion of heterogeneous olefin metathesis catalysts by controlling dynamic active site renewal

, 2021
Olefin metathesis is a versatile strategy for large-scale olefin interconversion, yet mechanistic details over industrial heterogeneous catalysts have remained ambiguous for decades.
Ka Wing, Chan, Jong Hun , Kang, John R., Di Iorio, Christophe, Copéret, Daniel F., Consoli, Sohel K., Shaikh, Ran, Zhu, Terry Z. H. , Gani, Zachariah J., Berkson, Yuriy, Román-Leshkov   +9 more
core   +1 more source

A Super‐Adhesive Air Filter With Capillarity‐Mediated Spontaneous Particle Absorption via Dynamic Bond Exchange

Advanced Materials, EarlyView.
We address the inherently weak particle adhesion of conventional air filters by coating a dynamically crosslinked adhesive layer that delivers capillarity‐driven strong adhesion and particle absorption mediated by dynamic bond exchange. The resulting enhancement in particle adhesion enables efficient ultrafast (up to 20 m s−1) and omnidirectional ...
Junyong Park, Hyeri Jeon, Hyunwoong Park, Ji Min Lee, Yeomyung Yoon, Gyeong Hwan Choi, Sazzadul A. Rahat, Dong Wook Lee, Sohdam Jeong, Jonathan T. Pham, Chae Bin Kim, Sanghyuk Wooh   +11 more
wiley   +1 more source

Anionic T‐Shaped Platinum(0) Pincer Complexes and Platinum(I) Intermediates in Radical Reactions With Alkyl Halides

Angewandte Chemie, EarlyView.
Two anionic, T‐shaped, d10 platinum(0) complexes containing a PNP pincer ligand have been isolated and characterized. These complexes react with aliphatic C‐Br bonds under formation of a platinum(II) bromide and an alkyl complex, as well as the homocoupled hydrocarbons.
Vincenz J. Kohler, Julia Rößling, Tim M. Diederich, Joachim Ballmann, Regine Herbst‐Irmer, Dietmar Stalke, Lutz H. Gade   +6 more
wiley   +2 more sources

Hoveyda–Grubbs catalysts with an N→Ru coordinate bond in a six-membered ring. Synthesis of stable, industrially scalable, highly efficient ruthenium metathesis catalysts and 2-vinylbenzylamine ligands as their precursors

Beilstein Journal of Organic Chemistry, 2019
A novel and efficient approach to the synthesis of 2-vinylbenzylamines is reported. This involves obtaining 2-vinylbenzylamine ligands from tetrahydroisoquinoline by alkylation and reduction followed by the Hofmann cleavage.
Kirill B. Polyanskii, Kseniia A. Alekseeva, Pavel V. Raspertov, Pavel A. Kumandin, Eugeniya V. Nikitina, Atash V. Gurbanov, Fedor I. Zubkov   +6 more
doaj   +1 more source

A study of the ring opening metathesis polymerization of polycyclic aromatic monomers and cyclopentenes with well defined initiators [PDF]

, 1994
This thesis describes studies into the ring opening metathesis polymerisation (ROMP) of polycyclic aromatic monomers and cyclopentenes. Chapter 1 reviews general aspects of ring opening metathesis polymerisation of relevance to the themes of this thesis.
Sugawara, Keiji
core  

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

Catalyst Hide‐and‐Seek Beneath Porous Support Surfaces: Pinpointing Active Site Distribution Through Resonance Energy Transfer

Angewandte Chemie, EarlyView.
Like a shark playing hide‐and‐seek in a coral reef, energy transfer (ET) finds hidden “fish” catalysts in the porous support “reef.” ET allows catalytic species to be precisely mapped, revealing whether they reside near the surface, deep in the pores, or are uniformly distributed. This approach ensures controlled catalyst distribution, highlighting how
Buddhima K. P. Maldeni Kankanamalage, William J. Thompson, Danielle N. Smith, Grace C. Thaggard, Namodhi Wijerathne, Isabella Incognito, Jeffery A. Byers, Jia Niu, Natalia B. Shustova   +8 more
wiley   +2 more sources

Synergistic approach to polycycles through Suzuki–Miyaura cross coupling and metathesis as key steps

Beilstein Journal of Organic Chemistry, 2018
This account provides an overview of recent work, including our own contribution dealing with Suzuki–Miyaura cross coupling in combination with metathesis (or vice-versa). Several cyclophanes, polycycles, macrocycles, spirocycles, stilbenes, biaryls, and
Sambasivarao Kotha, Milind Meshram, Chandravathi Chakkapalli   +2 more
doaj   +1 more source