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 <7; wherein L represents a C
2
-C
20
alkyl group, a C
6
-C
20
aryl group, or a C
7
-C
20
alkylaryl group; R
1
and R
2
can be identical or different and represent a hydrogen atom, a C
1
-C
4
alkyl group, a C
1
-C
4
hydroxyalkyl group, a C
1
-C
4
thioether group, a C
6
-C
20
aryl group, a C
7
-C
26
) alkylaryl group, a C
7
-C
20
alkylhydroxyaryl group, a C
4
-C
20
alkylheteroaryl group with 1 to 4 heteroatoms; or a C
1
-C
4
alkylcarboxylic moiety, which may be an acid, an amide, or which may be esterified with a C
1
-C
6
alkyl group or a C
7
-C
20
alkylaryl group; R
3
represents a C
1
-C
4
alkyl group; R
4
represents a hydrogen atom, or a C
1
-C
4
alkyl group; R
5
represents a C
1
-C
4
alkyl group; and X represents an alkali metal.
本发明涉及一种合成配方I化合物的方法,包括以下步骤:a)用偶联试剂反应式II和式III的Dane盐;b)向反应混合物中加入式IV的二胺;c)向反应混合物中加入酸,以调节反应的pH值小于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-C26烷基芳基、C7-C20烷基羟基芳基、具有1至4个杂原子的C4-C20烷基杂芳基或C1-C4烷基
羧酸基,可以是酸、
酰胺或
酯化为C1-C6烷基或C7-C20烷基芳基;R3代表C1-C4烷基;R4代表
氢原子或C1-C4烷基;R5代表C1-C4烷基;X代表碱
金属。