5,6,7,8-Tetrahydro-1H-2-benzopyran-1,3(4H)-dione

Base Information

Chemical Name:5,6,7,8-Tetrahydro-1H-2-benzopyran-1,3(4H)-dione
CAS No.:3711-74-8
Molecular Formula:C9H10O3
Molecular Weight:166.17400
Hs Code.:2918990090
Mol file:3711-74-8.mol

Synonyms:5,6,7,8-Tetrahydro-homophthalsaeureanhydrid;5,6,7,8-tetrahydro-4H-isochromene-1,3-dione;

Suppliers and Price of 5,6,7,8-Tetrahydro-1H-2-benzopyran-1,3(4H)-dione

Supply Marketing:

Business phase:: The product has achieved commercial mass production^*data from LookChem market partment

Manufacturers and distributors:

Manufacture/Brand
Chemicals and raw materials
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price

Total 8 raw suppliers

Chemical Property of 5,6,7,8-Tetrahydro-1H-2-benzopyran-1,3(4H)-dione

Chemical Property:

Melting Point:46℃
Boiling Point:334℃
Flash Point:163℃
PSA：43.37000
Density:1.24
LogP:1.33050

Purity/Quality:: 95% ^*data from raw suppliers

Safty Information:

Pictogram(s):
Hazard Codes:

MSDS Files:: SDS file from LookChem

Useful:

Technology Process of 5,6,7,8-Tetrahydro-1H-2-benzopyran-1,3(4H)-dione

There total 5 articles about 5,6,7,8-Tetrahydro-1H-2-benzopyran-1,3(4H)-dione 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: 33.0%

: 63177-18-4
2-carboxy-1-cyclohexeneacetic acid

: 3711-74-8
5,6,7,8-tetrahydro-4H-isochromene-1,3-dione

Guidance literature:: With trifluoroacetic anhydride; In dichloromethane; for 5h;
DOI:10.1023/A:1016250129246

Reference yield:

: 56955-19-2
ethyl 2-(2-oxo-1-cyano-2-ethoxyethylidene)-cyclohexanecarboxylate

: 3711-74-8
5,6,7,8-tetrahydro-4H-isochromene-1,3-dione

Guidance literature:: Multi-step reaction with 2 steps

1: 68 percent / conc. HCl / 6 h / Heating

2: 33 percent / (CF₃CO)2O / CH₂Cl₂ / 5 h

With hydrogenchloride; trifluoroacetic anhydride; In dichloromethane; 1: Hydrolysis / 2: Cyclization;
DOI:10.1023/A:1016250129246