The Upstream and Downstream products of 4,5-Dihydro-6-methyl-3(2H)-pyridazinone

4,5-Dihydro-6-methyl-3(2H)-pyridazinone, commonly referred to as 4,5-Dihydro-6-methyl-2H-pyridazin-3-one or simply MHW, is a five-membered heterocyclic compound with a six-carbon aromatic ring structure.
It belongs to the family of pyridazines and is primarily used as an intermediate in the production of various chemicals and pharmaceuticals.

Upstream Products

The production of 4,5-Dihydro-6-methyl-3(2H)-pyridazinone involves several upstream processes, including the synthesis of precursor compounds and their subsequent transformation into the final product.
One of the key upstream products is aniline, which is an aromatic amine derivative that serves as a precursor to the production of various dyes, drugs, and other chemical intermediates.
Aniline is typically produced through the nitration of toluene, followed by hydrogenation of the resulting nitro compound.

Another upstream product is 4-methoxyphenylacetic acid, which is used as a precursor to the production of both pharmaceuticals and other specialty chemicals.
This compound is typically synthesized through the acetylation of p-methoxyphenol, followed by hydrolysis of the resulting acetate ester.

Other upstream products include precursors such as α-methylphenylacetamide, methylamine, and toluene.
These compounds are used as building blocks for the synthesis of 4,5-Dihydro-6-methyl-3(2H)-pyridazinone.

Downstream Products

Once 4,5-Dihydro-6-methyl-3(2H)-pyridazinone is produced, it can be transformed into a variety of downstream products through various chemical reactions and processes.
One of the most common downstream products is 4-chloro-5-methyl-2H-pyrazol-3-one, which is used in the production of dyes, pharmaceuticals, and other specialty chemicals.
This compound is typically synthesized through the halogenation of 4,5-Dihydro-6-methyl-3(2H)-pyridazinone.

Other downstream products include derivatives of 4,5-Dihydro-6-methyl-3(2H)-pyridazinone that have been functionalized with different groups, such as chlorine, fluorine, or amino groups.
These functionalized derivatives are used as intermediates in the production of various drugs, such as antihistamines or antipsychotics, and other specialty chemicals, such as optical brighteners or fluorescent dyes.

Applications

4,5-Dihydro-6-methyl-3(2H)-pyridazinone and its downstream products have a wide range of applications in the chemical industry, including the production of dyes, pharmaceuticals, agricultural chemicals, and other specialty chemicals.

In the dye industry, 4,5-Dihydro-6-methyl-3(2H)-pyridazinone and its derivatives are used as intermediate products for the synthesis of azo dyes, which are widely used in the textile industry.
In particular, 4-chloro-5-methyl-2H-pyrazol-3-one is used as a precursor to the production of reactive yellow 2G, a widely used yellow azo dye.

In the pharmaceutical industry, 4,5-Dihydro-6-methyl-3(2H)-pyridazinone and