Results 81 to 90 of about 1,369,819 (304)

Ring-Opening Protonolysis of Strained Silicon-Containing Rings:  A New Approach to Ions with Silylium Character

open access: yes, 2016
Ring-Opening Protonolysis of Strained Silicon-Containing Rings:  A New Approach to Ions with Silylium ...
Alan J. Lough (1306146)   +3 more
core   +2 more sources

Selective Synthesis of Tetrahydroisoquinoline and Piperidine Scaffolds by Oxidative Ring Opening/Ring Closing Protocols of Substituted Indenes and Cyclopentenes

open access: yesChemistryOpen
Novel tetrahydroisoquinoline and piperidine derivatives were selectively synthesized from substituted indenes or cyclopentenes. The process starts with an oxidative cleavage of the ring olefin bond, which gives reactive diformyl intermediates.
Anas Semghouli   +4 more
doaj   +1 more source

The synthesis and ring-opening polymerisation of functionalised chiral O-carboxyanhydrides and cyclic carbonates [PDF]

open access: yes
This thesis presents the synthesis of two novel O-carboxyanhydrides derived from L-malic acid bearing 2,2,2-trichloroethyl- and 2-nitrobenzyl esters, followed by investigation of their ring-opening polymerisation to furnish chiral, functionalised poly ...
Bennison, Michael J.
core  

Calpain small subunit homodimerization is robust and calcium‐independent

open access: yesFEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy   +4 more
wiley   +1 more source

Enantioselective cyanation via radical-mediated C–C single bond cleavage for synthesis of chiral dinitriles

open access: yesNature Communications, 2019
Ring-opening reaction via selective cleavage of C–C bond is a powerful strategy to increase molecular complexity. Here the authors present the facile synthesis of chiral 1,5- and 1,6-dinitriles via the radical-mediated ring-opening and enantioselective ...
Tao Wang   +6 more
doaj   +1 more source

Photoinduced Ring Opening Copolymerization of Perfluoropolyalkylethers [PDF]

open access: yes, 2018
Perfluoropolyalkylethers (PFPAEs), based on structural units such as –(CF2O)–, –(CF2CF2O)–, –(CF2CF2CF2O)– and –(CF(CF3)CF2O)–, represent a special class of fluoropolymers with remarkable properties (low glass transition temperature, high chemical and ...
Alessandra Vitale   +7 more
core  

Ring-Opening Hydroarylation of Monosubstituted Cyclopropanes Enabled by Hexafluoroisopropanol

open access: yes, 2018
Ring-opening hydroarylation of cyclopropanes is typically limited to substrates bearing a donor-acceptor motif. Here, the transformation is achieved for monosubstituted cyclopropanes by using catalytic Brønsted acid in hexafluoroisopropanol (HFIP ...
Christopher Rowley   +11 more
core   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

open access: yesFEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa   +5 more
wiley   +1 more source

Ring Opening of Silacyclobutane

open access: yesJournal of the American Chemical Society, 1997
Multiconfigurational self-consistent field (MCSCF) wave functions, augmented by second order perturbation theory to partially recover the dynamic correlation, suggest that the most likely route from silacyclobutane to products ethylene + silene is initial cleavage of a ring CC bond to form a trans ·CH2SiH2CH2CH2· diradical, followed by rupture of the ...
Gordon, Mark   +2 more
openaire   +3 more sources

Ring-Opening Polymerization of Heterocycles with Palladium Insertion Catalysts:  Observation of a Multifunctional Polymerization Initiator

open access: yes, 2016
The palladium insertion polymerization catalysts (bipy)Pd(CH3)L+OTf- have been found to mediate a second class of polymerization reaction:  the ring-opening polymerization of heterocycles.
Bruce A. Arndtsen (1310721)   +3 more
core   +1 more source

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