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Process for preparing 2,2'-biphenols using selenium dioxide and halogenated solvent

A technology of selenium dioxide and biphenol, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., to achieve the effect of satisfying economy and simplifying processing work

Inactive Publication Date: 2016-01-27
EVONIK DEGUSSA GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Especially when using multi-step sequences, different solvents need to be changed, which is cumbersome and implies an additional cost factor

Method used

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  • Process for preparing 2,2'-biphenols using selenium dioxide and halogenated solvent
  • Process for preparing 2,2'-biphenols using selenium dioxide and halogenated solvent
  • Process for preparing 2,2'-biphenols using selenium dioxide and halogenated solvent

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Embodiment Construction

[0089] Hereinafter, the present invention will be explained in detail based on examples.

[0090] analyze

[0091] NMR spectroscopy

[0092] NMR spectroscopic studies have been carried out on multinuclear resonance spectrometers of the type AC300 or AVII400 from Bruker Analytical Measurement Technology, Karlsruhe. used CDCl 3 as a solvent. According to the NMR solvent data chart of Cambridge Isotopes Laboratories, USA, it is calibrated according to the remaining content of non-deuterated solvents 1 H-and 13 C-Spectrum. Partially carried out with the help of H, H-COSY, H, H-NOESY, H, C-HSQC and H, C-HMBC-spectroscopy 1 H-and 12C-signal attribution. Chemical shifts are expressed as delta values ​​in ppm. The following abbreviations are used for the multiplicity of NMR signals: s (singlet), bs (broad singlet), d (doublet), t (triplet), q (quartet), m (multiplet), dd (two sets of doublets), dt (two sets of triplets), tq (three sets of quartets). All coupling constants...

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Abstract

2,2'-biphenol is prepared in a process using selenium dioxide and a halogenated solvent.

Description

technical field [0001] The present invention relates to a process for the preparation of 2,2'-biphenol using selenium dioxide and a halogenated solvent. Background technique [0002] The direct coupling of phenols to the corresponding biphenol derivatives with great industrial utility has always been a challenge, as these reactions are usually neither regioselective nor chemoselective. [0003] The term phenols is used in this application as a generic term and therefore also includes substituted phenols. [0004] These biphenols can mainly be synthesized by electrochemical methods. Use carbon electrodes such as graphite, glassy carbon, BDD or noble metals such as platinum (refer to F.Stecker, A.Fischer, I.M.Malkowsky, S.R.Waldvogel, A.Kirste, WO2010139687A1 and A.Fischer, I.M.Malkowsky, F.Stecker , S.R. Waldvogel, A. Kirste WO2010023258A1). The disadvantage of these electrochemical methods is that some expensive devices have to be fabricated additionally. In addition, sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/11C07C39/15C07C391/02
CPCC07C37/11C07C391/02C07C39/15C07F11/00
Inventor K·M·迪巴拉R·弗兰克D·弗里达格S·R·瓦尔德福格尔T·奎尔M·米里翁
Owner EVONIK DEGUSSA GMBH
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