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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 .
Hutskalova V, Sparr C.
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Ring-Opening Fluorination of Isoxazoles
Organic Letters, 2022 A ring-opening fluorination of isoxazoles has been developed. Upon treatment of isoxazoles with an electrophilic fluorinating agent (Selectfluor), fluorination followed by deprotonation leads to tertiary fluorinated carbonyl compounds. This method features mild reaction conditions, good functional group tolerance, and a simple experimental procedure ...
Masaaki Komatsuda +4 more
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Ring-Opening Fluorination of Bicyclic Azaarenes
Chemical Science, 2021 A ring-opening fluorination of bicyclic azaarenes was developed. Although this overall transformation can be classified as an electrophilic fluorination of aromatics, it is a novel type of fluorination that results in construction of tert -C–F bonds.
Masaaki Komatsuda +6 more
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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 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. Silanol epoxides derived from trans-allylic alcohols, cis-allylic alcohols, trans-homoallylic alcohols, and cis-homoallylic alcohols were all compatible and gave products from either endo- or exo-ring opening.
SHYAM SATHYAMOORTHI +2 more
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Unexplored Nucleophilic Ring Opening of Aziridines
Molecules, 2010 The reactivity of dianions of carboxylic acids towards aziridines has been studied. Although, a similar reactivity to that of enolates from ketones, esters or amides has been observed, the method directly yields g-aminoacids in one step.
Ana María Costero +3 more
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Dispersity-controlled ring-opening polymerization of epoxide [PDF]
Nature CommunicationsDispersity or molar mass distribution (Ð M) profoundly influences polymer properties, but its control remains a challenge, especially for ring-opening polymerization (ROP).
Yubo Zhou, Junpeng Zhao, Guangzhao Zhang
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Alkylative Aziridine Ring-Opening Reactions
Molecules, 2021 In this study, the highly strained three-membered aziridine ring was successfully activated as the aziridinium ion by alkylation of the ring nitrogen with a methyl, ethyl or allyl group, which was followed by ring opening with external nucleophiles such ...
Jieun Choi, Taehwan Yu, Hyun-Joon Ha
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Chemistry Teacher International, 2021 Ring-opening polymerization is defined by IUPAC (Penczek, S., Moad, G. (2008). Glossary of the terms related to kinetics, thermodynamics, and mechanisms of polymerization.
Penczek Stanislaw +2 more
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Recent advances using cyclopropanols and cyclobutanols in ring-opening asymmetric synthesis
Green Synthesis and Catalysis, 2022 Due to high ring strain energies, cyclopropanols and cyclobutanols have a strong tendency of breaking the endocyclic C–C bonds to participate in versatile organic transformations.
Hong Yan, Gregory S. Smith, Fen-Er Chen
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