3,6-dihydroxypyromellitic acid

Base Information

• Chemical Name: 3,6-dihydroxypyromellitic acid
• CAS No.: 744216-81-7
• Molecular Formula: C₁₀H₆O₁₀
• Molecular Weight: 286.152
• Mol file: 744216-81-7.mol

Synonyms:3,6-dihydroxypyromellitic acid

Chemical Property of 3,6-dihydroxypyromellitic acid

Chemical Property:

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of 3,6-dihydroxypyromellitic acid

There total 9 articles about 3,6-dihydroxypyromellitic acid which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 84.0%

3,6-dimethoxypyromellitic acid → 3,6-dihydroxypyromellitic acid (744216-81-7)

Guidance literature:

With hydrogen bromide; acetic acid; for 5h; Reflux;

Reference yield: 32.0%

3,6-dimethoxypyromellitic acid tetramethyl ester → 3,6-dihydroxypyromellitic acid (744216-81-7)

Guidance literature:

With hydrogen bromide; In acetic acid; at 100 ℃; for 36h;

DOI:10.1021/ma502456f

Reference yield:

1,4-Difluoro-2,3,5,6-benzenetetracarboxylic dianhydride (46861-94-3) → 3,6-dihydroxypyromellitic acid (744216-81-7)

Guidance literature:

Multi-step reaction with 3 steps

1: sulfuric acid / 48 h / Reflux

2: N,N-dimethyl acetamide / 4 h / 140 °C / Inert atmosphere

3: hydrogen bromide / acetic acid / 36 h / 100 °C

With sulfuric acid; hydrogen bromide; In N,N-dimethyl acetamide; acetic acid;

DOI:10.1021/ma502456f

upstream raw materials:

3,6-dioxo-cyclohexa-1,4-diene-1,2,4,5-tetracarboxylic acid tetraethyl ester

3,6-difluoropyromellitic acid tetramethyl ester

1,4-Difluoro-2,3,5,6-benzenetetracarboxylic dianhydride

Downstream raw materials:

tetrabromobenzoquinone

p-benzoquinone

chloranil