4-[(E)-2-(3,4-Dimethoxy-phenyl)-vinyl]-6-oxo-6H-pyran-2-carboxylic acid methyl ester

Base Information

• Chemical Name: 4-[(E)-2-(3,4-Dimethoxy-phenyl)-vinyl]-6-oxo-6H-pyran-2-carboxylic acid methyl ester
• CAS No.: 180031-62-3
• Molecular Formula: C₁₇H₁₆O₆
• Molecular Weight: 316.31
• Mol file: 180031-62-3.mol

Synonyms:4-[(E)-2-(3,4-Dimethoxy-phenyl)-vinyl]-6-oxo-6H-pyran-2-carboxylic acid methyl ester

Chemical Property of 4-[(E)-2-(3,4-Dimethoxy-phenyl)-vinyl]-6-oxo-6H-pyran-2-carboxylic acid methyl ester

Chemical Property:

Purity/Quality:

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Technology Process of 4-[(E)-2-(3,4-Dimethoxy-phenyl)-vinyl]-6-oxo-6H-pyran-2-carboxylic acid methyl ester

There total 2 articles about 4-[(E)-2-(3,4-Dimethoxy-phenyl)-vinyl]-6-oxo-6H-pyran-2-carboxylic acid methyl ester 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:

4-(Brommethyl)-2-oxo-2H-pyran-6-carbonsaeure-methylester (103366-83-2) → 4-[(E)-2-(3,4-Dimethoxy-phenyl)-vinyl]-6-oxo-6H-pyran-2-carboxylic acid methyl ester (180031-62-3)

Guidance literature:

Multi-step reaction with 2 steps

1: 94 percent / toluene / 24 h / 1000 °C

2: K₂CO₃, 18-crown-6 / CH₂Cl₂ / 48 h / Heating

With 18-crown-6 ether; potassium carbonate; In dichloromethane; toluene;

DOI:10.1016/0031-9422(96)00242-7

Reference yield:

3,4-dimethoxy-benzaldehyde (120-14-9) + (6-Methoxycarbonyl-2-oxo-2H-pyran-4-ylmethyl)-triphenyl-phosphonium; bromide → 4-[(Z)-2-(3,4-Dimethoxy-phenyl)-vinyl]-6-oxo-6H-pyran-2-carboxylic acid methyl ester + 4-[(E)-2-(3,4-Dimethoxy-phenyl)-vinyl]-6-oxo-6H-pyran-2-carboxylic acid methyl ester (180031-62-3)

Guidance literature:

With 18-crown-6 ether; potassium carbonate; In dichloromethane; for 48h; Yield given. Yields of byproduct given. Title compound not separated from byproducts; Heating;

DOI:10.1016/0031-9422(96)00242-7

Reference yield: 50.0%

4-[(E)-2-(3,4-Dimethoxy-phenyl)-vinyl]-6-oxo-6H-pyran-2-carboxylic acid methyl ester (180031-62-3) → 4-[(E)-2-(3,4-Dihydroxy-phenyl)-vinyl]-6-oxo-6H-pyran-2-carboxylic acid methyl ester (180031-64-5)

Guidance literature:

With boron tribromide; In dichloromethane; at -78 - 20 ℃;

DOI:10.1016/0031-9422(96)00242-7

upstream raw materials:

3,4-dimethoxy-benzaldehyde

4-(Brommethyl)-2-oxo-2H-pyran-6-carbonsaeure-methylester

Downstream raw materials:

4-[(E)-2-(3,4-Dihydroxy-phenyl)-vinyl]-6-oxo-6H-pyran-2-carboxylic acid methyl ester