Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von Vanillin, welches eine elektrochemische Oxidation einer wässrigen, ligninhaltigen Suspension oder Lösung an einer Anode umfasst, wobei als Anode eine Silberelektrode verwendet wird.
Abstract:
Die Erfindung betrifft ein Verfahren zur Herstellung von Biarylen, wobei durch anodische Kreuz-Dehydrodimerisierung von substituierten Phenolen mit Arenen in Gegenwart von teil- und/oder perfluorierten Mediatoren und einem Leitsalz gearbeitet wird.
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 A 1 , A 2 , A 3 , A 4 , A 5 , and A 6 are independently from each other selected from H and F, wherein at least one of the group A 1 , A 2 , A 3 , A 4 , A 5 , and A 6 is F; R is selected from R 1 , and C(O)OR 1 , and R 1 is selected from C 1 -C 6 alkyl, C 3 -C 6 cycloalkyl, C 2 -C 6 alkenyl, C 3 -C 6 cycloalkenyl, C 5 -C 7 (hetero)aryl, and C 2 -C 6 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 invention relates to a method for producing biaryls, wherein anodic cross-dehydrodimerization of substituted phenols with arenes in the presence of partially fluorinated or perfluorinated mediators and a conducting salt is used.
Abstract:
The invention relates to a method for producing an amine, comprising the step of cathodic reduction of a corresponding oxime derivative of general formula (I), wherein R represents C1-6 alkyl or C2-6 alkenyl, which is optionally substituted with one or more substituents independently selected from the group consisting of phenyl, O-C1-6 alkyl, NH-C1-6 alkyl, N(C1-6 alkyl)2, OH and NH2; R1 represents H; C1-6 alkyl or C(O)-C1-6 alkyl and A represents a 5-, 6- or 7-membered hydrocarbon ring which is saturated or which has a double bond and wherein optionally at least one CH2 group is replaced by -O-, -S- -NH-, -N=, or -N(C1-6 alkyl)- and which is optionally substituted with one or more other substituents independently selected from the group consisting of phenyl, C1-6 alkyl, O-C1-6 alkyl, NH-C1-6-alkyl, N(C1-6 alkyl)2, OH and NH2; and the oxime derivative, with respect to the carbon ring having the substituent R, having an excess of the R or S form of at least 10 %.
Abstract:
The invention relates to a method for producing an amine, comprising the step of cathodic reduction of a corresponding oxime derivative of general formula (I), wherein R represents C1-6 alkyl or C2-6 alkenyl, which is optionally substituted with one or more substituents independently selected from the group consisting of phenyl, O-C1-6 alkyl, NH-C1-6 alkyl, N(C1-6 alkyl)2, OH and NH2; R1 represents H; C1-6 alkyl or C(O)-C1-6 alkyl and A represents a 5-, 6- or 7-membered hydrocarbon ring which is saturated or which has a double bond and wherein optionally at least one CH2 group is replaced by -O-, -S- -NH-, -N=, or -N(C1-6 alkyl)- and which is optionally substituted with one or more other substituents independently selected from the group consisting of phenyl, C1-6 alkyl, O-C1-6 alkyl, NH-C1-6-alkyl, N(C1-6 alkyl)2, OH and NH2; and the oxime derivative, with respect to the carbon ring having the substituent R, having an excess of the R or S form of at least 10 %.
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 A 1 , A 2 , A 3 , A 4 , A 5 , and A 6 are independently from each other selected from H and F, wherein at least one of the group A 1 , A 2 , A 3 , A 4 , A 5 , and A 6 is F; R is selected from R 1 , and C(O)OR 1 , and R 1 is selected from C 1 -C 6 alkyl, C 3 -C 6 cycloalkyl, C 2 -C 6 alkenyl, C 3 -C 6 cycloalkenyl, C 5 -C 7 (hetero)aryl, and C 2 -C 6 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, said method comprising the electrochemical oxidization of an aqueous suspension or solution containing lignin at an anode, wherein a silver electrode is used as the anode.