Synthesis method of 2,2'-bipyridine-4,4'-dicarboxaldehyde

Abstract

The invention relates to a synthesis method of 2,2'-bipyridine-4,4'-dicarboxaldehyde. The synthesis method comprises the following steps that 2,2'-bipyridine-4,4'-dicarboxaldehyde is dissolved in a sulfuric acid solution with mass concentration of 70 to 80%; a manganese oxide is added into the mixed solution obtained by the previous to undergo a reaction at a temperature of 100 to 145 DEG C for 7to 20 hours; after the reaction finishes, the reaction products are cooled to room temperature; the cooled reaction products are mixed with an ice-water mixture or ice cubes to form a solid-liquid mixture a; the solid-liquid mixture a is adjusted to a pH value of 7; and the adjusted solid-liquid mixture is subjected orderly to extraction and evaporation concentration to form a product of 2,2'-bipyridine-4,4'-dicarboxaldehyde, wherein a mass ratio of 2,2'-bipyridine-4,4'-dicarboxaldehyde to the manganese oxide to sulfuric acid is 1: (1.4 to 4.4): (30 to 70). The synthesis method has the advantages of simple reaction step, simple operation, high yield, low cost and low pollution. Therefore, the synthesis method has a good prospect of industrialized application.

Description

technical field

[0001] The invention belongs to the field of organic synthesis, and in particular relates to a synthesis method of 2,2'-bipyridine-4,4'-dicarbaldehyde. Background technique

[0002] 2,2'-bipyridyl-4,4'-dicarbaldehyde is an important chemical and pharmaceutical synthesis intermediate and ligand, molecular formula C 12 h 8 N 2 o 2 , with a molecular weight of 212, can form metallic complexes with conjugated electronic systems with various metals such as platinum, osmium, europium, terbium and ruthenium. These complexes can exhibit optical, electrical, thermal, magnetic functions and catalytic properties, so In particular, it shows important application value in photoelectric conversion. The ruthenium complexes of 2,2'-bipyridyl-4,4'-dicarbaldehyde are used in dye-sensitized solar cells and are an important class of photosensitizers. 2,2'-bipyridyl-4,4'-dicarbaldehyde is currently completely dependent on imports, and the price is very expensive, which seri...

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