2338-76-3Relevant articles and documents
Synthesis method of 1-phenyl-3-(3-trifluoromethylphenyl)-2-acetone
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Paragraph 0005; 0011-0013, (2021/11/21)
The invention belongs to the technical field of chemical intermediates, and particularly relates to a synthesis method of 1-phenyl-3-(3-trifluoromethylphenyl)-2-acetone. A compound A is used as a basic raw material, and 1-phenyl-3-(3-trifluoromethylphenyl)-2-acetone is obtained through Blanc chloromethylation, substitution reaction, Claisen ester condensation and hydrolysis reaction in sequence. The synthesis method of 1-phenyl-3-(3-trifluoromethylphenyl)-2-acetone is high in purity, high in yield and simple to operate.
Preparation method of 3-trifluoromethylphenylacetonitrile
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Paragraph 0007; 0024; 0037, (2017/08/27)
The invention discloses a preparation method of 3-trifluoromethylphenylacetonitrile; 3-trifluoromethylbenzyl chloride is synthesized from trifluoromethyl benzene, tripolyformaldehyde, sulfuric acid and thionyl chloride under the action of the catalyst and is cyanided with sodium cyanide under the action of a phase transfer catalyst to obtain 3-trifluoromethylphenylacetonitrile; the preparation method is simple and is high in yield, produced wastewater is recyclable, environmental pollution is greatly reduced, reaction with the catalysts is faster, reaction temperature is lower, equipment corrosion due to side reaction where products are decomposed into HF is reduced, and the method is easy to industrialize.
Synthesis and electronic spectra of substituted oligo(phenylenevinylene)s
Detert, Heiner,Sugiono, Erli
, p. 587 - 590 (2007/10/03)
A series of substituted oligo(p-phenylenevinylene)s (OPVs) with five benzene rings was prepared via PO-activated olefinations and Knoevenagel condensations. The central ring is substituted with two octyloxy groups to ensure good solubility of the OPVs and the lateral styrene units carry further substituents, with either electron-accepting or donating character and also combinations thereof. The spectral features of these OPVs are dominated by the basic chromophore; further auxochrome groups on the lateral rings (meta and para positions) shift the absorption and emission spectra only slightly to longer wavelengths. Significant bathochromic shifts (absorption ca 20 nm, emission ca 40 nm) are observed for OPVs with cyano groups on the terminal vinylene segments. The absorption spectra are independent from the concentration and solvatochromism is very small. The OPVs are photochemically stable to near-UV irradiation (366 nm) in neutral solution, whereas mid-UV irradiation (254 nm) causes decomposition of the chromophore. The presence of traces of acids or amines leads to different photochemical pathways. Copyright