Results 11 to 20 of about 3,194 (256)
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
Synthesis and desulfurization-decarboxylation of cyclic thionocarbonates of glycerol 1-ethers
Journal of Lipid Research, 1969 A method is described for the synthesis of cyclic thionocarbonates of 1-O-alkyl glycerols in quantitative yield. These derivatives of glycerol ethers can be quantitated by UV absorbance, analyzed by gas-liquid chromatography, or quantitatively converted ...
S. Ramachandran +2 more
doaj +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
, 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
Investigation of the stability of azacrown complexes with some transition metal ions [PDF]
مجله علوم و فنون هستهای, 2020 The separation of metal ions from nuclear waste is an important issue in the nuclear industry. Cyclic chemical compounds including ether groups are called crown ethers. These compounds strongly bind to certain cations, forming complexes.
M. Arabieh +3 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
doaj +1 more source
Reactivity of Nitrovinylquinones with Cyclic and Acyclic Enol Ethers [PDF]
The Journal of Organic Chemistry, 2002 AbstractFor Abstract see ChemInform Abstract in Full Text.
Wayland E, Noland, Brant L, Kedrowski
openaire +2 more sources