- 7-substituted quinone methides as inhibitors for unsaturated monomers
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Ethylenically unsaturated monomers are protected from premature polymerization during manufacture and storage by the incorporation therein of an effective stabilizing amount of a 7-substituted quinone methide compound.
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- SYNTHESIS AND PROPERTIES OF PHOSPHORYLATED 2,6-DI-BUTYL-4-METHYLENE-2,5-CYCLOHEXADIENONES
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The products of the oxidation of phosphorylated sterically hindered phenols, proceeding via the intermediate formation of phosphorylated phenoxyl radicals, are phosphorylated 4-methylene-2,5-cyclohexadienones.The reaction of amines (aniline, piperidine) with phosphorylated 4-methylene-2,5-cyclohexadienones results in 1,6-addition products.
- Ismagilov, R. K.,Moskva, V. V.,Arkhipov, V. P.,Ivantsov, A. E.,Kopylova, L. Yu.
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p. 349 - 352
(2007/10/02)
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- α-SUBSTITUIERTE PHOSPHONATE 55. EIN NEUES TRIPHOSPHONAT AUS BISPHOSPHONO-CHINONMETHID UND DIALKYLPHOSPHIT
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By oxidation of 3,5-di-tert-butyl-4-hydroxyphenylmethanephosphonate (4) or the analogous arylsubstituted bisphosphonate (5) with PbO2 the hitherto unknown 7-mono- or 7.7-bisphosphonylated quinonemethides (13) or (11), resp., are formed in good yields.The quinonemethides simply added dialkylphosphite to form the bisphosphonate (5) or the trisphosphonate (13), the latter having a remarkable stability.The structures of the quinonemethides (13) and (11) as well as of the tris-phosphonate (12) could be proved unambiguously by IR-, 1H-, 13C- and 31P-NMR spectra.
- Gross, Hans,Ozegowski, Sigrid,Costisella, Burkhard
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