Abstract: Novel 2,2?-diaminobiaryls having two secondary amines and an electrochemical process for preparation thereof.

Abstract: Method for coupling a phenol and an arene using selenium dioxide, and also novel phenol-arene derivatives.

Abstract: The present invention concerns a method for producing asymmetrical biphenols using selenium dioxide.

Abstract: The invention relates to a method for oxidative electrochemical amination of non-activated or deactivated aromatic systems by means of boron-doped diamond anodes, and in particular to the production of 1,5-diaminonaphthalene and 1-amino-5-nitronaphthalene according to said method.

Abstract: The invention relates to an electrochemical method for the selective coupling of a phenol to a naphthol which differ in their oxidation potential. The invention also relates to compounds which can be produced by electrochemical coupling.

Abstract: The present invention relates to a process for preparing compounds of the formula ABA by reacting a compound of the formula (A) with a compound of the formula (B) with X?—OR? or —NHR? and R??H or a protecting group function and R1, R2, R3, R4, R5, R6, R7 and R8 are each independently selected from the group comprising hydrogen, (C1-C12)-alkyl, O—(C1-C12)-alkyl, (C6-C20)-aryl, O—(C6-C20)-aryl, where two of the R1 to R4 radicals may also be joined via a covalent bond, and halogen, which is characterized in that the reaction is conducted electrochemically.

Abstract: The present invention relates to a process for preparing unsymmetric compounds from the group of the m-terphenyls which can be used as unsymmetric OCO pincer ligands, comprising the process steps of a) reacting a first substituted or unsubstituted phenol with a 1,3-disubstituted arene which may likewise be substituted in the 2 and 5 positions to obtain a phenol-arene coupling product and b) optionally protecting the OH group of the phenol-arene coupling product with a protecting group to obtain a protected phenol-arene coupling product, and c) reacting the phenol-arene coupling product from a) or b) with a second substituted or unsubstituted phenol to obtain an unsymmetric m-terphenyl, with the proviso that the first phenol and the second phenol have different substitution, characterized in that at least one of process steps a) and c) is conducted as an electrochemical process step.

Abstract: A process for preparing a 2,2?-biphenol, proceeds by a) adding a first phenol to a reaction mixture, b) adding a second phenol to the reaction mixture, c) adding selenium dioxide to the reaction mixture, d) adding an acid having a pKa in the range from 0.0 to 5.0 to the reaction mixture, and e) heating the reaction mixture such that the first phenol and the second phenol are converted to said 2,2?-biphenol.

Abstract: Method for coupling a phenol and an arene using selenium dioxide, and also novel phenol-arene derivatives.

Abstract: Method for coupling two arenes with selenium dioxide to give a selenobiaryl ether, and also novel selenobiaryl ethers.

Abstract: The invention is concerned with a process for preparing 2,2?-biaryls, especially of 2,2?-biphenols in which a reaction mixture comprising a first aryl, a second aryl and selenium dioxide is heated, the first aryl being reacted with the second aryl to give the corresponding 2,2?-biaryl, wherein the reaction mixture additionally comprises molybdenum(V) chloride.

Abstract: The invention relates to an electrochemical method for coupling phenol and aniline, the difference of the oxidation potential of the substrates being in the region of 10 mV-450 mV and the substrate with the highest oxidation potential being added in excess. Said method enables biaryls, which have hydroxy- and amino functions, to be electrochemically produced and to dispense with multi-step syntheses using metallic reagents.

Abstract: The invention relates to an electrochemical method for the selective coupling of a phenol to a naphthol which differ in their oxidation potential. The invention also relates to compounds which can be produced by electrochemical coupling.

Abstract: Electrochemical process for coupling two phenols of different oxidation potential, and novel biphenols which can be prepared by this electrochemical coupling.

Abstract: The invention relates to an electrochemical method for coupling anilines. When coupling two different anilines, the difference of the oxidation potential of the substrates is in the region of between 10 mV bis 450 mV, and the aniline with the highest oxidation potential is added in excess. Said method enables biaryldiamines to be electrochemically produced and to dispense with multi-step syntheses using metallic reagents.

Abstract: A process for preparing a 2,2?-selenobiaryl ether or a 4,4?-selenobiaryl ether, proceeds by a) adding a first phenol to the reaction mixture, b) adding a second phenol to the reaction mixture, c) adding selenium dioxide to the reaction mixture, d) adding a base having a pKb in the range from 8 to 11 to the reaction mixture, and e) adjusting the reaction temperature of the reaction mixture such that the first phenol and the second phenol are converted to said 2,2?-selenobiaryl ether or said 4,4?-selenobiaryl ether.

Abstract: A process for preparing a 2,2?-biphenol, proceeds by a) adding a first phenol to a reaction mixture, b) adding a second phenol to the reaction mixture, c) adding selenium dioxide to the reaction mixture, d) adding an acid having a pKa in the range from 0.0 to 5.0 to the reaction mixture, and e) heating the reaction mixture such that the first phenol and the second phenol are converted to said 2,2?-biphenol.

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

Abstract: An electrolyte composition (A) containing (i) at least one aprotic organic solvent; (ii) at least one conducting salt; (iii) at least one compound of formula (I) wherein A1, A2, A3, A4, A5, and A6 are independently from each other selected from H and F, wherein at least one of the group A1, A2, A3, A4, A5, and A6 is F; R is selected from R1, and C(O)OR1, and R1 is selected from C1-C6 alkyl, C3-C6 cycloalkyl, C2-C6 alkenyl, C3-C6 cycloalkenyl, C5-C7 (hetero)aryl, and C2-C6 alkinyl, wherein alkyl, cycloalkyl, alkenyl, cycloalkenyl, (hetero)aryl, and alkinyl may be substituted by one or more F; and (iv) optionally at least one further additive.

Abstract: The present invention relates to a method for producing vanillin, which comprises an electrochemical oxidation of an aqueous, lignin-comprising suspension or solution at an anode, wherein the anode used is a silver electrode.