0000000000147620
AUTHOR
Jürgen Ritz
Versuche zur umsetzung von methylendiphenolen mit glucosederivaten und zur kondensation von O-phenylglucosidderivaten
Attempts to apply known methods of glucosidation to oligo[(hydroxyphenylene)methylene]s were not satisfying. The reaction of 4,4'-dimethyl-2,2'-methylenediphenol (1a) with 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl bromide gave a monoglucoside in 11% yield. A second attempt, the condensation of suitable O-phenylglucoside derivatives was unsuccessful. From a series of O-phenylglucosides (4) only 4-(2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyloxy)benzylbromide could be condensed with O-(4-hydroxymethylphenyl)-2,3,4,6-tetra-O-acetylglucopyranose to the corresponding diglucoside of 4,4'-oxydimethylenediphenol (7). Condensation reactions of the O-phenylglucoside 4k, to obtain an O-glucosidized poly[…
Spektroskopische analyse mehrfacher methacrylsäureester von oligo[(2-hydroxy-1,3-phenylen)methylen]en mittels UV-, IR-, 1H NMR- und massenspektren
The structures of two homologous series of oligo[(2-hydroxy-1,3-phenylene)methylene]s completely esterified with methacrylic acid, were spectroscopically analysed. The molar decadal absorption coefficients of ultraviolet absorption maxima of the two homologous series confirm Hunter's relation. The vinylidene, ester, and substitution bands of the infrared spectra as well as the mass spectra agree with the accepted structures. The 1H NMR spectra permit to differentiate between exterior and interior groups of the molecules.
Darstellung von phenolischen verbindungen und phenol/formaldehyd-polykondensaten mit ketoxim-, aldoxim- oder 1-methyl-4-hydroxyiminomethylpyridinium-gruppen und deren wirkung auf parathion-methyl® und verwandte verbindungen
Thirteen low molecular weight oximes were prepared: one derivative of acetophenone (1), two derivatives of benzophenone (2 and 3), two derivatives of salicylaldehyde containing two phenolic nuclei (4c and 5c), and eight compounds in which a phenol unit is substituted by a 4-hydroxyiminomethylpyridiniummethyl group (8a–f, 10c, and 11c). Besides these compounds polymeric phenol formaldehyde condensates were synthesized which contain units deriving from benzophenoneoxime (15b) or from salicylaldehyde (22b) and condensates containing 4-hydroxyiminomethylpyridiniummethyl groups (23c). A series of low molecular weight and water soluble compounds (8a–f) were proved as antidotes on mice which were …
Eine einfache, vollstäundige Veresterung von Oligo[(2-hydroxy-1,3-phenylen)methylen]en mit Methacryloylchlorid
Die Darstellung phenolischer Methacrylsaureester verlauft glatt und mit Reinausbeuten bis zu 95%, wenn die in gekuhltem Benzol (5—10°C) in Gegenwart von Triathylamin gelosten phenolischen Verbindungen mit Methacryloylchlorid umgesetzt werden. So wurden neben drei einfachen Phenylmethacrylaten zehn vollstandig veresterte Oligo[(2-hydroxy-1,3-phenylen)methylen]e erhalten. Phenyl methacrylates can easily be prepared with yields of pure esters up to 95% by reaction of the phenolic compounds with methacryloyl chloride in cooled benzene (5—10°C) in the presence of triethylamine. Three simple phenyl methacrylates and ten oligo[(2-hydroxy-1,3-phenylene)methylene]s completely esterified by methacryl…