Results 11 to 20 of about 1,369,818 (304)
Aromatic ring-opening metathesis [PDF]
NatureAbstract Aromatic compounds are used across chemistry and materials science as a result of their stability, characteristic interactions, defined molecular shape and the numerous approaches for their synthesis by a diversity of cyclization reactions 1 .
Valeriia Hutskalova, Christof Sparr
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Ring-Opening Polymerization of Hemoglobin [PDF]
Biomacromolecules, 2019 Hemoglobin (Hb), an oxygen-carrying protein, has an α2β2 tetrameric structure that dissociates reversibly into two αβ dimers (α2β2 ⇄ 2αβ). We synthesized a cyclic Hb-ring monomer with two β subunits bound through a 10 kDa polyethylene glycol (PEG) chain.
Takashi Matsuhira +2 more
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Ring-Opening Fluorination of Bicyclic Azaarenes [PDF]
Chemical Science, 2021 We have discovered a ring-opening fluorination of bicyclic azaarenes. Upon treatment of bicyclic azaarenes such as pyrazolopyridines with electrophilic fluorinating agents, fluorination of the aromatic ring is followed by a ring-opening reaction. Although this overall trans-formation can be classified as an electrophilic fluorination of an aromatic ...
Masaaki Komatsuda +6 more
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Ring Opening of Epoxides by Pendant Silanols [PDF]
Organic Letters, 2021 We present a new ring-opening reaction of epoxides by pendant silanols, catalyzed by either Ph3C+BF4– or BINOL-phosphoric acid. In all cases examined, the reaction is perfectly regioselective and diastereoselective. Silanol epoxides derived from trans-allylic alcohols, cis-allylic alcohols, trans-homoallylic alcohols, and cis-homoallylic alcohols were ...
SHYAM SATHYAMOORTHI +2 more
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Mechanically Enhanced Proline Ring-Opening in Proteins [PDF]
, 2022 Proteins such as collagen and elastin are subjected to highly repetitive stresses in the cardiovascular system. These proteins can have half-lives of many decades and, therefore, experience many tens or hundreds of millions of stress-strain cycles.
Jan, Hoh
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Radical Ring-Opening of Oxetanes Enabled by Co-Catalysis [PDF]
, 2021 Oxetanes are valuable building blocks due to their well-explored propensity to undergo ring-opening reactions with diverse nucleophiles. However, their application as precursors of radical species remains unexplored. Herein, we present a cobalt catalysis-
Wojciech , Chaładaj +3 more
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Organocatalytic activation of cyclopropanes in asymmetric synthesis
Tetrahedron Chem, 2023 Cyclopropanes are strained carbocycles that can undergo ring opening reactions in which one of the C–C bond present in the cycle is broken following a radical or ionic mechanism.
Efraím Reyes +4 more
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Flavin-enabled reductive and oxidative epoxide ring opening reactions
Nature Communications, 2022 Epoxide ring opening reactions are important in both biological processes and synthetic applications. Here, the authors show that flavin cofactors can catalyze reductive and oxidative epoxide ring opening reactions and propose the underlying mechanisms.
Bidhan Chandra De +13 more
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Conditions to Control Furan Ring Opening during Furfuryl Alcohol Polymerization
Molecules, 2022 The chemistry of biomass-derived furans is particularly sensitive to ring openings. These side reactions occur during furfuryl alcohol polymerization.
Lucie Quinquet +2 more
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An electrochemical approach to aluminum-based redox switchable ring opening polymerization [PDF]
, 2023 We report the electrochemically switchable reactivity of (salfen)Al(OiPr) (salfen = 1,1′-di(2,4-bis-tert-butyl-salicylimino)ferrocene) toward the ring opening polymerization of various cyclic esters, ethers, and carbonates.
Amy, Lai +3 more
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