Evonik Industries Ag

Evonik Technochemie Gmbh

Martin Bindl

Gunter Knaup

Günter Knaup

Roland Herrmann

Roland Hermann

The invention relates to a method for the synthesis of a compound according to formula I comprising the following steps: a) reacting a Dane salt according to formula II and a Dane salt according to formula III with a coupling reagent; b) adding a diamine according to formula IV to the reaction mixture; and c) adding an acid to the reaction mixture to adjust the pH value of the reaction to &#x3c;7; wherein L represents a C-Calkyl group, a C-Caryl group, or a C-Calkylaryl group; Rand Rcan be identical or different and represent a hydrogen atom, a C-Calkyl group, a C-Chydroxyalkyl group, a C-Cthioether group, a C-Caryl group, a C-Calkylaryl group, a C-Calkylhydroxyaryl group, a C-Calkylheteroaryl group with 1 to 4 heteroatoms; or a C-Calkylcarboxylic moiety, which may be an acid, an amide, or which may be esterified with a C-Calkyl group or a C-Calkylaryl group; Rrepresents a C-Calkyl group; Rrepresents a hydrogen atom, or a C-Calkyl group; Rrepresents a C-Calkyl group; and X represents an alkali metal.

Synthesis of diamido gellants by using Dane salts of amino acids

The invention relates to a method for the synthesis of a compound according to formula I comprising the following steps: a) reacting a N-carboxyanhydride according to formula II and a N-carboxy-anhydride according to formula III with a diamine according to formula IV and b) adding an acid to the reaction to adjust the pH value of the reaction to &#x3c;7; wherein L represents a C-Calkyl group, a C-Caryl group, or a C-Calkylaryl group; and Rand Rcan be identical or different and represent a hydrogen atom, a C-Calkyl group, a C-Chydroxyalkyl group, a C-Cthioether group, a C-Caryl group, a C-Calkylaryl group, a C-Calkylhydroxyaryl group, a C-Calkylheteroaryl group with 1 to 4 heteroatoms; or a C-Calkylcarboxylic moiety, which may be an acid, an amide, or which may be esterified with a C-Calkyl group or a C-Calkylaryl group.

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Ludwigshafen, Germany

Martin Bindl