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 < 7; wherein L represents a C2-C20 alkyl group, a C6-C20 aryl group, or a C7 -C20 alkylaryl group; and R1 and R2 can be identical or different and represent a hydrogen atom, a C1-C4 alkyl group, a C1-C4 hydroxyalkyl group, a C1-C4 thioether group, a C6-C20 aryl group, a C7-C20 alkylaryl group, a C7-C20 alkylhydroxyaryl group, a C4-C20 alkylheteroaryl group with 1 to 4 heteroatoms; or a C1-C4 alkylcarboxylic moiety, which may be an acid, an amide, or which may be esterified with a C1-C6 alkyl group or a C7-C20 alkylaryl group.
该发明涉及一种合成符合式I的化合物的方法,包括以下步骤:a)将符合式II的N-
羧酸酐和符合式III的N-
羧酸酐与符合式IV的二胺反应;b)向反应中加入酸以调整反应的pH值至<7;其中L代表C2-C20烷基、C6-C20芳基或C7-C20烷基芳基;R1和R2可以相同也可以不同,代表氢原子、C1-C4烷基、C1-C4羟基烷基、C1-C4
硫醚基、C6-C20芳基、C7-C20烷基芳基、C7-C20烷基羟基芳基、带有1至4个杂原子的C4-C20烷基杂芳基;或者是C1-C4烷基羧基部分,可以是酸、酰胺,或者可以与C1-C6烷基或C7-C20烷基芳基酯化。