17354-14-2Relevant articles and documents
Synthesis and solid state structure of fluorous probe molecules for fluorous separation applications
Lehmler,Telu,Vyas,Shaikh,Rankin,Knutson,Parkin
, p. 2561 - 2569 (2010)
A series of colored hydrocarbon and fluorocarbon tagged 1-fluoro-4-alkylamino-anthraquinones and 1,4-bis-alkylamino-anthraquinone probe molecules were synthesized from a (fluorinated) alkyl amine and 1,4-difluoroanthraquinone to aid in the development of fluorous separation applications. The anthraquinones displayed stacking of the anthraquinone tricycle and interdigitation of the (fluorinated) alkyl chains in the solid state. Furthermore, intramolecular N-H?O hydrogen bonds forced the hydrocarbon and fluorocarbon tags into a conformation pointing away from the anthraquinone tricycle, with the angle of the tricycle plane normal and the main (fluorinated) alkyl vector ranging from 1° to 39°. Separation of the probe molecules on fluorous silica gel showed that the degree of fluorination of the probe molecules plays only a minor role with most eluents (e.g., hexane/ethyl acetate and methyl nonafluorobutyl ethers/ethyl acetate). However, toluene as eluent caused a pronounced separation by degree of fluorination for fluorocarbon, but not hydrocarbon tagged probe molecules on both silica gel and fluorous silica gel. These studies suggest that hydrocarbon and fluorocarbon tagged anthraquinones are useful probe molecules for the development of laboratory scale fluorous separation applications.
Solvent blue 35 of a kind of preparation method
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Paragraph 0019-0020, (2017/03/23)
The invention discloses a method for preparing solvent blue 35. The method comprises the following steps: adding ethanol, anhydrous sodium sulfate, 1,4-dihydroxyanthraquinone, 1,4-dihydroxyanthraquinone leuco, acetic acid and n-butylamine into a reactor, closing the reactor, heating to a refluxing temperature, reacting under a pressure of 0.08Mpa or less for 1-4h, distilling off an ethanol and n-butylamine mixed solvent, adding alkaline water to realize separation, filtering, washing, drying, and discharging. In the invention, acetic acid is used as a catalyst, anhydrous sodium sulfate is used as a water absorbing agent, and 1,4-dihydroxyanthraquinone is mixed with the 1,4-dihydroxyanthraquinone leuco in reasonable proportion, so the reaction speed is improved, and the yield is improved; and ethanol is adopted as a solvent to reduce the generation of tar, and a recovered ethanol and n-butylamine mixed solution can be directly used after dehydration in order to reduce the generation of wastewater.
1,4-Diamino- and 1,4-Dibutylamino-anthraquinones: Reduction and/or Deprotonation-initiated Elimination of the Butyl Groups in Dipolar Aprotic Media
Anne, Agnes
, p. 311 - 318 (2007/10/02)
The standard redox potentials of the one- and two-electron reductions of the title compounds have been determined.The deprotonated form of the dibutylamino compound underwent a base-initiated elimination of the butyl groups and the basicity of the radical anion resulting from one-electron reduction was sufficient to provoke the same type of cleavage through an initial father-son reaction.A multi-step mechanism is proposed for the elimination on the basis of the identification of intermediates.