1095-78-9Relevant articles and documents
Green preparation method of 2,2-bis(4-aminophenyl)hexafluoropropane
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, (2021/11/10)
The invention relates to the field of fine organic synthesis, in particular to a green preparation method of 2,2-bis(4-aminophenyl)hexafluoropropane. The green preparation method comprises the following steps: (a) carrying out oxidation reaction on 2,2-bis(4-methylphenyl)hexafluoropropane and oxygen in a perfluorinated compound solvent, and conducting separating to obtain 2,2-bis (4-carboxyphenyl)hexafluoropropane; (b) carrying out a reflux reaction on the compound obtained in the step (a) and ammonia gas in an organic solvent to obtain ammonium salt of 2,2-bis(4-carboxylphenyl)hexafluoropropane; (c) mixing the compound obtained in the step (b) with an organic solvent, carrying out heating, and raising a temperature for dehydrating to obtain 2,2-bis(4-formamidophenyl)hexafluoropropane; and (d) carrying out a Hofmann degradation reaction on the compound obtained in the step (c) and sodium hypochlorite in a hydrofluoroether solvent, and carrying out purifying to obtain the 2,2-bis(4-aminophenyl)hexafluoropropane. According to the invention, a selected oxidizing agent is economical and green, and the oxidizing solvent is non-combustible and non-explosive; and a hydrofluoroether solvent is selected for the Hofmann reaction, so high-COD wastewater is reduced, and industrial production is facilitated.
Synthesis method of 2,2-bis(4-aminophenyl)hexafluoropropane
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Paragraph 0008; 0021-0033, (2020/07/12)
The invention relates to a 2,2-bis(4-aminophenyl)hexafluoropropane synthesis method, which comprises: adopting a compound represented by a formula I as a raw material, adopting nickel chloride as a catalyst, adopting guanidine hydrochloride as an ammonia source, and carrying out a reaction to obtain a compound represented by a formula II, wherein the compound represented by the formula II is the target product 2,2-bis(4-aminophenyl)hexafluoropropane. According to the invention, a brand-new reaction route is provided, bisphenol AF which is cheap and easy to obtain is adopted as a raw material,nickel chloride is adopted as a catalyst, guanidine hydrochloride is adopted as an ammonia source, and the reaction step is shortened into one step in a high-pressure kettle, so that operation is easy, safety is high, the yield is high, and industrial production is easy to achieve.
Functionalized Photoreactive Compounds
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, (2008/12/08)
The present invention concerns functionalized photoreactive compounds of formula (I), that are particularly useful in materials for the alignment of liquid crystals. Due to the adjunction of an electron withdrawing group to specific molecular systems bearing an unsaturation directly attached to two unsaturated ring systems, exceptionally high photosensitivities, excellent alignment properties as well as good mechanical robustness could be achieved in materials comprising said functionalized photoreactive compounds of the invention.
