5417-32-3Relevant academic research and scientific papers
Process for the preparation of acetal copolymers with backbone bromo functional groups
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, (2008/06/13)
The invention concerns a method for producing an acetal copolymer containing backbone bromo-functional groups comprising copolymerizing trioxane with 5,6,-dibromo-1,3--dioxepene. The invention also concerns methods of modifying acetal copolymers containing bromo-functional groups and the copolymers produced by the methods of the invention.
Acetal copolymers with backbone isocyanate functional groups
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, (2008/06/13)
Iodoisocyano, iodourea and oxazole modified 1,3 dioxep-5-ene ring monomers are synthesized and used in copolymerization reactions with trioxane to produce acetal copolymers with backbone functional groups. The invention also concerns processes for the production of acetal copolymers containing iodourea and oxazole functional groups from acetal copolymers with backbone double bonds.
Acetal copolymers with backbone double bonds
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, (2008/06/13)
Acetal copolymers of trioxane and 1,3-dioxep-5-ene having a high degree of crystallinity and specific mole percent incorporations of 1,3-dioxep-5-ene are synthesized. The invention also provides a process for producing highly crystalline acetal copolymers by copolymerizing trioxane and 1,3-dioxep-5-ene and precipitating the copolymer product from solution. The copolymers show much improved stability against halogen degradation.
Bis(triphenylstannyl)telluride: A mild and selective reagent for telluration and debromination
Li,Harpp
, p. 6291 - 6294 (2007/10/02)
Bis(triphenylstannyl)telluride 1 coupled with fluoride ion is a mild telluration reagent in a reaction with dihalides. In addition, this combination constitutes a very effective debromination procedure for the high-yield formation of olefins from 1,2-dihalides.
Acetal copolymers with backbone amine groups
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, (2008/06/13)
Acetal copolymers of trioxane with epoxy functional groups are obtained by copolymerizing trioxane with 5,6-epoxy--1,3-dioxepane. The epoxide group in the polymer chain provides a highly reactive functional group for further modification. Acetal copolymers with backbone epoxide groups exhibit toughness and thermal stability. The backbone epoxide groups can also be aminated in a one step hydrolysis-amination process.
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
Fragmentation of Cyclic Carboxonium Ions, III. 1,3-Dioxepan-4-ylium Ions, a Key for the Synthesis of Tetrahydrofuran-3-carbaldehydes
Scharf, Hans-Dieter,Frauenrath, Herbert
, p. 1472 - 1479 (2007/10/02)
The formation of 1,3-dioxepane-4-ylium ions (3) is achieved by protonation of 4,5-dihydro-1,3-dioxepines (2).These are prepared by ?-bond isomerization of 4,7-dihydro-1,3-dioxepines (1) under basic conditions.Thermal fragmentation of 3 and subsequent recy
