6,7-dimethyl-2-(4'-methylphenyl)-4-oxo-4H-1-benzopyran-8-carboxylic acid

Base Information

Chemical Name:6,7-dimethyl-2-(4'-methylphenyl)-4-oxo-4H-1-benzopyran-8-carboxylic acid
CAS No.:129696-97-5
Molecular Formula:C₁₉H₁₆O₄
Molecular Weight:308.334
Hs Code.:

Synonyms:6,7-dimethyl-2-(4'-methylphenyl)-4-oxo-4H-1-benzopyran-8-carboxylic acid

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Chemical Property of 6,7-dimethyl-2-(4'-methylphenyl)-4-oxo-4H-1-benzopyran-8-carboxylic acid

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Technology Process of 6,7-dimethyl-2-(4'-methylphenyl)-4-oxo-4H-1-benzopyran-8-carboxylic acid

There total 5 articles about 6,7-dimethyl-2-(4'-methylphenyl)-4-oxo-4H-1-benzopyran-8-carboxylic 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:

: 129697-08-1
6,7-Dimethyl-4-oxo-2-p-tolyl-4H-chromene-8-carbonitrile

: 129696-97-5
6,7-dimethyl-2-(4'-methylphenyl)-4-oxo-4H-1-benzopyran-8-carboxylic acid

Guidance literature:: Multi-step reaction with 2 steps

1: 75 percent / 80percent aq. sulfuric acid / 3 h / 170 °C

2: 64 percent / 40percent nitrosulfuric acid in 87percent sulfuric acid, H₂O / Ambient temperature

With sulfuric acid; water;
DOI:10.1016/0223-5234(93)90127-Z

Reference yield:

: 89638-56-2
3-cyano-4,5-dimethyl-2-hydroxyacetophenone

: 129696-97-5
6,7-dimethyl-2-(4'-methylphenyl)-4-oxo-4H-1-benzopyran-8-carboxylic acid

Guidance literature:: Multi-step reaction with 5 steps

1: 93 percent / 1.) a) Et₃N / dioxane / 1.) a) 30 min, b) RT, overnight

2: 73 percent / KOH, pyridine / 1.) a) reflux, 2 h, b) RT, overnight

3: 90 percent / AcONa / acetic acid / 4 h / Heating

4: 80percent aq. H₂SO₄ / 3 h / 170 °C

5: 1.) 80percent H₂SO₄, aq. NaNO₂, 2.) urea / 1.) 5 deg C, 1 h, 2.) 80 deg C, 2 h

With pyridine; potassium hydroxide; sulfuric acid; sodium acetate; triethylamine; urea; sodium nitrite; In 1,4-dioxane; acetic acid;

Reference yield:

: 129696-74-8
4-Methyl-benzoic acid 6-acetyl-2-cyano-3,4-dimethyl-phenyl ester

: 129696-97-5
6,7-dimethyl-2-(4'-methylphenyl)-4-oxo-4H-1-benzopyran-8-carboxylic acid

Guidance literature:: Multi-step reaction with 4 steps

1: 73 percent / KOH, pyridine / 1.) a) reflux, 2 h, b) RT, overnight

2: 90 percent / AcONa / acetic acid / 4 h / Heating

3: 80percent aq. H₂SO₄ / 3 h / 170 °C

4: 1.) 80percent H₂SO₄, aq. NaNO₂, 2.) urea / 1.) 5 deg C, 1 h, 2.) 80 deg C, 2 h

With pyridine; potassium hydroxide; sulfuric acid; sodium acetate; urea; sodium nitrite; In acetic acid;