1a,7a-Dihydro-5-methyl-1a-(4-methylphenyl)-7H-oxireno<1>benzopyran-7-one

Base Information

• Chemical Name: 1a,7a-Dihydro-5-methyl-1a-(4-methylphenyl)-7H-oxireno<1>benzopyran-7-one
• CAS No.: 136764-52-8
• Molecular Formula: C₁₇H₁₄O₃
• Molecular Weight: 266.296

Synonyms:1a,7a-Dihydro-5-methyl-1a-(4-methylphenyl)-7H-oxireno<1>benzopyran-7-one

Chemical Property of 1a,7a-Dihydro-5-methyl-1a-(4-methylphenyl)-7H-oxireno<1>benzopyran-7-one

Chemical Property:

Purity/Quality:

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Technology Process of 1a,7a-Dihydro-5-methyl-1a-(4-methylphenyl)-7H-oxireno<1>benzopyran-7-one

There total 5 articles about 1a,7a-Dihydro-5-methyl-1a-(4-methylphenyl)-7H-oxireno<1>benzopyran-7-one 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: 100.0%

6-methyl-2-(p-tolyl)-4H-chromen-4-one (88952-74-3) → 1a,7a-Dihydro-5-methyl-1a-(4-methylphenyl)-7H-oxireno<1>benzopyran-7-one (136764-52-8)

Guidance literature:

With 3,3-dimethyldioxirane; In dichloromethane; acetone; at -10 ℃; for 34h;

DOI:10.1021/jo00026a020

Reference yield:

5-methyl-2-hydroxyacetophenone (1450-72-2) → 1a,7a-Dihydro-5-methyl-1a-(4-methylphenyl)-7H-oxireno<1>benzopyran-7-one (136764-52-8)

Guidance literature:

Multi-step reaction with 4 steps

1: pyridine

2: 85percent KOH / pyridine / Heating

3: sulfuric acid, glacial acetic acid

4: 100 percent / dimethyldioxirane / acetone; CH₂Cl₂ / 34 h / -10 °C

With pyridine; potassium hydroxide; sulfuric acid; 3,3-dimethyldioxirane; acetic acid; In pyridine; dichloromethane; acetone;

DOI:10.1021/jo00026a020

Reference yield:

2-acetyl-4-methylphenyl 4-methylbenzoate (4010-25-7) → 1a,7a-Dihydro-5-methyl-1a-(4-methylphenyl)-7H-oxireno<1>benzopyran-7-one (136764-52-8)

Guidance literature:

Multi-step reaction with 3 steps

1: 85percent KOH / pyridine / Heating

2: sulfuric acid, glacial acetic acid

3: 100 percent / dimethyldioxirane / acetone; CH₂Cl₂ / 34 h / -10 °C

With potassium hydroxide; sulfuric acid; 3,3-dimethyldioxirane; acetic acid; In pyridine; dichloromethane; acetone;

DOI:10.1021/jo00026a020

upstream raw materials:

6-methyl-2-(p-tolyl)-4H-chromen-4-one

5-methyl-2-hydroxyacetophenone

2-acetyl-4-methylphenyl 4-methylbenzoate

4-methyl-benzoyl chloride

Downstream raw materials:

4',6-Dimethyl-3-hydroxyflavone

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