4H-1-BENZOPYRAN-2-CARBOXYLIC ACID, 7-METHOXY-4-OXO-

Base Information

• Chemical Name: 4H-1-BENZOPYRAN-2-CARBOXYLIC ACID, 7-METHOXY-4-OXO-
• CAS No.: 23915-78-8
• Molecular Formula: C11H8O5
• Molecular Weight: 220.182
• Hs Code.: 2918990090
• Mol file: 23915-78-8.mol

Synonyms:4H-1-BENZOPYRAN-2-CARBOXYLIC ACID, 7-METHOXY-4-OXO-;7-METHOXY-4-OXO-4H-1-BENZOPYRAN-2-CARBOXYLIC ACID;OTAVA-BB 1023172

Chemical Property of 4H-1-BENZOPYRAN-2-CARBOXYLIC ACID, 7-METHOXY-4-OXO-

Chemical Property:

• PSA: 76.74000
• LogP: 1.49980

Purity/Quality:

99% ^*data from raw suppliers

4H-1-BENZOPYRAN-2-CARBOXYLIC ACID, 7-METHOXY-4-OXO- 95.00% ^*data from reagent suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

SDS file from LookChem

Useful:

Technology Process of 4H-1-BENZOPYRAN-2-CARBOXYLIC ACID, 7-METHOXY-4-OXO-

There total 9 articles about 4H-1-BENZOPYRAN-2-CARBOXYLIC ACID, 7-METHOXY-4-OXO- 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: 86.0%

7-methoxy-4-oxo-4H-chromene-2-carboxylic acid ethyl ester (38322-74-6) → 7-methoxy-4(H)-oxo-1-benzopyran-2-carboxylic acid (23915-78-8)

Guidance literature:

With PPA; at 150 ℃; for 3.5h;

DOI:10.1081/SCC-120002508

Reference yield: 83.0%

1-(2-hydroxy-4-methoxyphenyl)ethanone (552-41-0) + oxalic acid diethyl ester (95-92-1) → 7-methoxy-4(H)-oxo-1-benzopyran-2-carboxylic acid (23915-78-8)

Guidance literature:

1-(2-hydroxy-4-methoxyphenyl)ethanone; oxalic acid diethyl ester; With sodium methylate; In 1,4-dioxane; methanol; at 120 ℃; for 0.333333h; Microwave irradiation;

With hydrogenchloride; In 1,4-dioxane; methanol; at 120 ℃; for 0.666667h; Microwave irradiation;

DOI:10.3390/molecules24234214

Reference yield: 67.0%

(E)-2-(3-Methoxy-phenoxy)-but-2-enedioic acid → 7-methoxy-4(H)-oxo-1-benzopyran-2-carboxylic acid (23915-78-8)

Guidance literature:

With sulfuric acid; In various solvent(s); at 60 ℃; for 0.166667h;

DOI:10.1071/CH9950677

upstream raw materials:

7-methoxy-4-oxo-4H-chromene-2-carboxylic acid ethyl ester

ethyl 7-hydroxy-4-oxo-4H-chromen-2-carboxylate

1-(2-hydroxy-4-methoxyphenyl)ethanone

O-methylresorcine

Downstream raw materials:

N-phenyl-7-methoxy-4(H)-oxo-1-benzopyran-2-carboxamide

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