Results 11 to 20 of about 12,676 (308)
Rh(II)-Catalyzed Spirocyclization of α‑Diazo Homophthalimides with Cyclic Ethers
, 2019 Rh(II)-catalyzed decomposition of α-diazo homophthalimides in the presence of cyclic ethers gave spirocyclic products of Stevens-type [1,2]-alkyl shift within the postulated oxonium ylide intermediate.
Alexander S. Novikov (1616380) +5 more
core +6 more sources
Bis(arylsulfonyl) Peroxide-Mediated Difunctionalization of Cyclic Enol Ethers
, 2023 A bis(arylsulfonyl) peroxide-mediated 1,2-difunctionalization of cyclic enol ethers is reported. Bis(nosyl) peroxide selectively sulfonylates the 3-position of enol ethers, generating an oxocarbenium ion that is trapped by a carboxylic acid nucleophile ...
Armido Studer +3 more
core +1 more source
2 versus E2 Competition of Cyclic Ethers
, 2023 We have quantum chemically studied the influence of ring strain on the competition between the two mechanistically different SN2 and E2 pathways using a series of archetypal ethers as substrate in combination with a diverse set of Lewis bases (F−, Cl ...
Hansen, Thomas; id_orcid +9 more
core +1 more source
Metal-Free Synthesis of N-Aryl-Substituted Azacycles from Cyclic Ethers Using POCI3
, 2021 A facile method for the synthesis of N-aryl-substituted azacycles from arylamines and cyclic ethers has been developed. In this study, arylamines were treated with cyclic ethers in the presence of POCI3 and DBU to provide five- and six-membered azacycles.
강수성
core +1 more source
Giant, 2023 ABAC-type periodic poly(cyclic acetal)s were synthesized via a two-step method consisting of the synthesis of a sequence-programmed cyclic trimers from one vinyl monomer and two bifunctional aldehydes (isophthalaldehyde or terephthalaldehyde) and the ...
Tadashi Naito +2 more
doaj +1 more source
, 2020 The enantio- and chemoselective iridium-catalyzed N- and O-allylation of oximes is described for the first time. Kinetic resolution in an intramolecular setting provides access to cyclic nitrones, oxime ethers and enantioenriched aliphatic allylic ...
Tobias, Sandmeier, Erick, Carreira
core +1 more source
Applied Sciences, 2022 Cyclic organic compounds with several ether linkages in their structure are of much concern in our daily life applications. Crown ethers (CEs) are generally heterocyclic and extremely versatile compounds exhibiting higher binding affinity.
Faiz Ullah +10 more
doaj +1 more source
NIPPON KAGAKU KAISHI, 2002 フッ素含有率の高いヘキサフルオロプロピレンオキシド(HFPO)と環状エーテルとの反応による重合について検討を行った．モノマーとして六員環エーテルであるテトラヒドロピラン(THP)を用いたときには，重合体は得られなかった．四員環エーテルであるオキセタン，および三員環エーテルであるプロピレンオキシド(PO)をモノマーとして用いたときに重合生成物が得られた． モノマーとしてオキセタンを用いたときに，最も高分子量の重合体を得ることができ，その数平均分子量は4.8 × 103であった．これは，オキセタンの開環重合反応性が，環状エーテルの中で最も高いためであると考えられる． モノマーとしてプロピレンオキシド(PO)を用いたときに得られる重合生成物は ...
Yasuyuki MASUBUCHI +4 more
openaire +2 more sources
Crystals, 2017 The electrostatic potential near to the oxygen atom in each of the cyclic ethers 2,5-dihydrofuran, oxetane and oxirane has been calculated by using a distributed multipole analysis (DMA) of each molecule. The electrostatic potential energy V(φ) of a unit
J. Grant Hill, Anthony C. Legon
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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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