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Several fluorinated and chlorofluorinated acrylates and methacrylates were synthesized from the alcohols RFCH2OH with RF=CCl3, CHClCH2CCl3, (CF2CFCl)nCl, (C2F4)nH, CF3, C7F15 and C6F13CH2. The corresponding polymers were also studied for their application as transparent polymeric materials. For this purpose the refractive indices n20D of the monomers and the polymers were measured as were the Tg values of the polymers. A study of their infrared spectra shows to what extent these products could be utilized taking into consideration their absorption in the long wavelength range between 0.85 and 1.50 m. The refractive indices of these polymers, which are reduced when increasing the number of fluorine atoms in the molecule, and that of the Tg measured between 50 and 70° C for the fluorinated methacrylates, indicate a potential use of these polymers as sheathing materials for optical fibres.
- Boutevin,Rigal,Rousseau,Bosc
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- Magnesium Salt-Induced Opening of α,β-Epoxy Sulfoxides: A Synthesis of α-Chloro Ketones, α-Alkoxy Ketones, and α,β-Unsaturated Ketones from Carbonyl Compounds through α,β-Epoxy Sulfoxides
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Magnesium chloride in alcohols was found to be effective to promote the opening of α,β-epoxy sulfoxides, giving a variety of compounds such as α-chloro ketones, α-alkoxy ketones, or α,β-unsaturated ketones.The products of the reaction were dependent upon the combination of the substituents on the epoxy group of α,β-epoxy sulfoxides, magnesium salt, solvent, and reaction conditions.Keywords -- α,β-epoxy sulfoxide; epoxide; α-chloro ketone; α-alkoxy ketone; α,β-unsaturated ketone; magnesium chloride
- Satoh, Tsuyoshi,Sugimoto, Atsushi,Yamakawa, Koji
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p. 4632 - 4636
(2007/10/02)
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- A NEW SYNTHESIS OF α,β-UNSATURATED KETONES. ALLYLIC ALKYLATION OF 1-ISOCYANO-1-TOSYLALKENES
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Ketones (1) are homologated to enones 2 by alkylating (introduction of R3) the condensation products 4 (derived from 1 and tosylmethyl isocyanide), followed by acid catalyzed hydrolysis.
- Moskal, Janusz,Leusen, Albert M. van
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p. 2585 - 2588
(2007/10/02)
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- Novel Acylation of Aliphatic Olefins Promoted by Active Zinc Compounds
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It was found that acylation of a variety of aliphatic olefins with acid chlorides is efficiently promoted by active zinc compounds, which were prepared from a Zn/Cu couple and alkyl iodides.The crude product mixtures were subsequently treated with 1 M KOH in methanol or were subjected to catalytic hydrogenation to afford the corresponding α,β-unsaturated or saturated ketones in good to moderate yields.It was also shown that the reaction fully follows the Markovnikov rule.
- Shono, Tatsuya,Nishiguchi, Ikuzo,Sasaki, Manji,Ikeda, Haruhiko,Kurita, Makoto
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p. 2503 - 2505
(2007/10/02)
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