2,2,2',2'-Tetramethyl-6,6',7,7'-tetramethoxy-3',4'-dihydro-3,4'-bi[2H-1-benzopyran]

Base Information

• Chemical Name: 2,2,2',2'-Tetramethyl-6,6',7,7'-tetramethoxy-3',4'-dihydro-3,4'-bi[2H-1-benzopyran]
• CAS No.: 17678-76-1
• Molecular Formula: C₂₆H₃₂O₆
• Molecular Weight: 440.536
• Mol file: 17678-76-1.mol

Synonyms:Chroman,4-(6,7-dimethoxy-2,2-dimethyl-2H-1-benzopyran-3-yl)-6,7-dimethoxy-2,2-dimethyl-(8CI); Ageratochromene dimer; Ageratochromene, low-melting dimer

Chemical Property of 2,2,2',2'-Tetramethyl-6,6',7,7'-tetramethoxy-3',4'-dihydro-3,4'-bi[2H-1-benzopyran]

Chemical Property:

• PSA: 55.38000
• LogP: 5.62030

Purity/Quality:

Analysis control,96.0% ^*data from raw suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of 2,2,2',2'-Tetramethyl-6,6',7,7'-tetramethoxy-3',4'-dihydro-3,4'-bi[2H-1-benzopyran]

There total 8 articles about 2,2,2',2'-Tetramethyl-6,6',7,7'-tetramethoxy-3',4'-dihydro-3,4'-bi[2H-1-benzopyran] 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: 72.0%

precocene II (644-06-4) → 6,7,6',7-tetramethoxy-2,2,2',2'-tetramethyl-3',4'-dihydro-2H,2'Hbenzopyran> (17678-76-1,145374-05-6) + 1,2,10,11-tetramethoxy-5,5,7,7-tetramethyl-6,6a,6b,12b-tetrahydro-5H,7H-cyclopenta(2,1-e:3,4-de)bis[1]benzopyran (51949-51-0) + 3,4-dihydro-6,7-dimethoxy-2,2-dimethyl-3-(6,7-dimethoxy-2,2-dimethyl-2H-1-benzopyran-4-yl)-4-(3,4-dihydro-6,7-dimethoxy-2,2-dimethyl-2H-1-benzopyran-3-yl)-2H-1-benzopyran

Guidance literature:

With aluminium trichloride; In diethyl ether; at -5 ℃; for 0.333333h;

DOI:10.1002/mrc.1023

Reference yield: 18.0%

precocene II (644-06-4) → 6,7,6',7-tetramethoxy-2,2,2',2'-tetramethyl-3',4'-dihydro-2H,2'Hbenzopyran> (17678-76-1,145374-05-6) + 1,2,10,11-tetramethoxy-5,5,7,7-tetramethyl-6,6a,6b,12b-tetrahydro-5H,7H-cyclopenta(2,1-e:3,4-de)bis[1]benzopyran (51949-51-0) + 6,7,6',7'-tetramethoxy-2,2,2',2'-tetramethyl-2H,2'H-<3,3'-bi-1-benzopyran>-4'(3'H)-one + 2,3,10,11-tetramethoxy-6,6,7,7-tetramethyl-6a,6b,12b,13a-tetrahydro-6H,7H-furo<3,2-c:4,5-c'>bis<1>benzopyran

Guidance literature:

With silica gel; iron(III) chloride; In dichloromethane; for 5h; Mechanism; Ambient temperature;

Reference yield:

precocene II (644-06-4) → 6,7,6',7-tetramethoxy-2,2,2',2'-tetramethyl-3',4'-dihydro-2H,2'Hbenzopyran> (17678-76-1,145374-05-6) + 6,7-dimethoxy-2,2-dimethyl-3-nitrochromene (89004-22-8) + (6aS,6bS,12bS,13aR)-2,3,10,11-Tetramethoxy-6,6,7,7-tetramethyl-6a,6b,12b,13a-tetrahydro-6H,7H-5,8,13-trioxa-dibenzo[a,i]fluorene (89004-21-7) + (6aS,6bS,12bR,13aR)-2,3,10,11-Tetramethoxy-6,6,7,7-tetramethyl-6a,6b,12b,13a-tetrahydro-6H,7H-5,8,13-trioxa-dibenzo[a,i]fluorene (89064-12-0)

Guidance literature:

With silica gel; silver nitrate; In Petroleum ether; at 20 ℃; for 48h; Further byproducts given;

upstream raw materials:

precocene II

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