Extract obtained from the bark of Betula Pendula was treated with sodium hydroxide solution to obtain 4-(4-hydroxyphenyl) butan-2-one. New (meth)acrylates were synthesized on the basis of 4-(4-hydroxyphenyl)butan-2-one. Free radical polymerization of the new (meth)acrylates was compared with that of commercial monomers (e. g. phenyl(meth)acrylate, 2-phenoxyethyl methacrylate, and benzyl methacrylate) in solution resulting in soluble polymers as expected in all examples. In contrast to this, free radical polymerization of 4-(4-acryloylox-yphenyl)butan-2-one in bulk resulted in a crosslinked material although an extremely high molecular weight soluble polymer was received in case of bulk polymerization of 4-(4-methacryloyloxyphenyl)butan-2-one. The 3-oxobutyl substituent at the phenyl ring of these monomers may influence their radical polymerization. Furthermore, enzyme mediated radical polymerization and photoinitiated polymerization were applied for the polymer synthesis using 4-(4-methacryloyloxyphenyl)butan-2-one.
Extracts of white birch (Betula pendula) may be a useful source of aromatics, polyols, and fatty acids. Ultra performance liquid chromatography/electrospray ionization‐quadrupole time‐of‐flight mass spectrometry (UPLC/ESI(−)‐QTOFMS) and gas chromatography/electron impact‐quadrupole mass spectrometry (GC/EI‐QMS) were applied to analyze the soluble fractions obtained after the sequential extraction of the bark and interior wood of a white birch trunk using methanol and the ionic liquid 1‐butyl‐3‐methylimidazolium chloride. Methanolic extracts of both the bark and interior wood contained diarylheptanoids and polyols. By contrast, fatty acids were found only in the methanolic extracts of interior wood. Additional diarylheptanoids, 3‐O‐caffeoyl‐betulin, and smaller phenolic compounds were extracted with the ionic liquid. Surprisingly, the ionic liquid extracts included additional compounds, which may be have formed in a reaction of the ionic liquid. The use of the bark resulted in more soluble material. Thus, this bark may be preferred as a renewable resource for organic materials.
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