The present invention provides a novel method for the synthesis of an intermediate dye product having the following formula:
1
wherein
L is S, Te, or Se;
R
1
and R
2
are either the same or different aryl or alkyl compounds;
R
3
is hydrogen or a short chain alkyl group; and
Z is an anion.
The process to formulate this intermediate compound entails reacting an R
1
-acetylene compound with an R
2
-acetylene compound (compounds A) into an enol ether compound with the R
1
and/or R
2
constituents (compound D) And from compound D, it forms into an intermediate dye compound having an L-based cyclic ring with the R
1
and/or R
2
constituents (compound F). With compound F the desired dye can be made with a greater overall yield for mass production.
本发明提供了一种新型的中间
染料合成方法,其具有以下公式:1其中L为S、Te或Se;R1和R2为相同或不同的芳基或烷基化合物;R3为氢或短链烷基;Z为阴离子。制备该中间化合物的过程涉及将R1-
乙炔化合物与R2-
乙炔化合物(化合物A)反应成具有R1和/或R2成分的烯醚化合物(化合物D),然后从化合物D形成具有基于L的环状环的中间
染料化合物,其中包含R1和/或R2成分(化合物F)。使用化合物F可以获得更高的总产量,以进行大规模生产所需的
染料。