2568-24-3Relevant academic research and scientific papers
Degradable precision polynorbornenes via ring-opening metathesis polymerization
Moatsou, Dafni,Nagarkar, Amit,Kilbinger, Andreas F. M.,O'Reilly, Rachel K.
, p. 1236 - 1242 (2016)
In an attempt to introduce monomer sequence control in a growing polynorbornene via ring-opening metathesis polymerization, we employ dioxepins to efficiently determine the location of the monomers on the macromolecule backbone. Owing to the acid-labile a
Alternating Ring-Opening Metathesis Polymerization Provides Easy Access to Functional and Fully Degradable Polymers
Boadi, Francis O.,Zhang, Jingling,Yu, Xiaoxi,Bhatia, Surita R.,Sampson, Nicole S.
, p. 5857 - 5868 (2020)
Polymers with hydrolyzable groups in their backbones have numerous potential applications in biomedicine, lithography, energy storage, and electronics. In this study, acetal and ester functionalities were incorporated into the backbones of copolymers by m
Monofunctional metathesis polymers via sacrificial diblock copolymers
Hilf, Stefan,Berger-Nicoletti, Elena,Grubbs, Robert H.,Kilbinger, Andreas F. M.
, p. 8045 - 8048 (2006)
(Chemical Equation Presented) A small price to pay: The second block of a diblock copolymer is "sacrificed" in order to leave behind a monofunctionalized metathesis polymer with a hydroxy end group. By incorporation of a dioxepine unit into the copolymer, a breaking point is created between the block to be end-functionalized and the block to be sacrificed.
Lewis Acid-Catalyzed Vinyl Acetal Rearrangement of 4,5-Dihydro-1,3-dioxepines: Stereoselective Synthesis of cis- And trans-2,3-Disubstituted Tetrahydrofurans
Ghosh, Arun K.,Belcher, Miranda R.
, p. 10399 - 10412 (2020/09/02)
Lewis acid-catalyzed rearrangements of 4,5-dihydro-1,3-dioxepines have been investigated. Rearrangement of vinyl acetals under a variety of conditions resulted in cis- and trans-2,3-disubstituted tetrahydrofuran derivatives in a highly stereoselective man
Rhodium-Catalyzed Intramolecular C-H Bond Activation with Triazoles: Preparation of Stereodefined Pyrrolidines and Other Related Cyclic Compounds
Senoo, Masato,Furukawa, Ayana,Hata, Takeshi,Urabe, Hirokazu
supporting information, p. 890 - 895 (2016/01/16)
On treatment of triazoles having an N-sulfonyl-protected benzylamine moiety with [Rh2(C7H15CO2)4], intramolecular C-H bond insertion takes place at the benzylic position to give cis-N-sulfonyl-2-aryl-3-[(sulfonylimino)methyl]pyrrolidines in good yields and with highly stereoselectivities. Analogously, the similar treatment of triazoles having an ether or even an alkyl moiety affords 2-alkyl- or 2-aryl-3-[(sulfonylimino)methyl]tetrahydrofurans or a 2-alkyl-3-[(sulfonylimino)methyl]cyclopentane in good yields. Three is a magic number: On treatment of triazoles with [Rh2(C7H15CO2)4], the rhodium catalyst plays three roles, denitrogenation, C-H bond activation, and stereoselective cyclization, providing a new method for heterocycle synthesis. Intramolecular C-H bond insertion takes place at the benzylic position to give pyrrolidines and related heterocycles in good yields.
2,4,4,6-Tetrabromo-2,5-cyclohexadienone (TABCO) as a versatile, efficient, and chemoselective catalyst for the acetalization and transacetalization of carbonyl compounds, the preparation of acetonides from epoxides and acylals (1,1-diacetates) from aldehydes
Firouzabadi, Habib,Iranpoor, Nasser,Shaterian, Hamid Reza
, p. 2195 - 2205 (2007/10/03)
The efficient and chemoselective preparation of acetals and ketals from carbonyl compounds, transacetalization reactions, the conversion of epoxides to acetonides, and the preparation of acylals from aldehydes in the presence of catalytic amounts of 2,4,4,6-tetrabromo-2,5-cyclohexadienone (TABCO) are described.
Asymmetric synthesis of thietanose
Uenishi, JuN'Ichi,Motoyama, Mitsuhiro,Kimura, Yumi,Yonemitsu, Osamu
, p. 439 - 451 (2007/10/03)
Syntheses of optically active thietanose, (2R,3R,4R)-4-acetoxymethyl-3-(tert-butyldimethylsilyl)oxy-2-ethoxythietane (6) and (2R,3R,4R)-3-(tertbutyldimethylsiIyl)oxy-4-[(/m-butyldimethylsilyl)oxy]methyl-2- ethoxythietane (23) are described. The key interm
Isomer Selectivity in Stereocontrolled Payne Rearrangement-epoxide Cleavage of 2,3-Epoxy Alcohols in Aprotic Solvents: Application to an Enantioselective Total Synthesis of (+)-exo-Brevicomin
Page, Philip C. Bulman,Rayner, Christopher M.,Sutherland, Ian O.
, p. 1375 - 1382 (2007/10/02)
Organo-copper and -cuprate reagents may be used to trap the more reactive epoxy alkoxide isomer in a Lewis acid-catalysed Payne rearrangement process.This methodology has been used as the key step in a five-step enantioselective total synthesis of (+)-exo
Photochemistry and Photophysics of 3-(2-Isoxazolinyl)-phenylketones
Timpe, H.-J.,Schmidt, M.,Fisera, L'.
, p. 735 - 747 (2007/10/02)
3-Benzoyl-Δ2-1,2-oxazolines (1-6) are formed by 1,3-dipolar cycloaddition between benzoylnitril-N-oxide (8) and dihydrofurane 9 or 1,3-dioxep-5-enes (10a-c).The preparative yields are small due to the competitive dimerization of the dipole 8.Tw
