5,7-Dimethoxy-2,2-dimethylchromene

Base Information

• Chemical Name: 5,7-Dimethoxy-2,2-dimethylchromene
• CAS No.: 21421-66-9
• Molecular Formula: C₁₃H₁₆O₃
• Molecular Weight: 220.268
• DSSTox Substance ID: DTXSID30175694
• Nikkaji Number: J1.464.312E
• Wikidata: Q83046019
• Mol file: 21421-66-9.mol

Synonyms:5,7-dimethoxy-2,2-dimethylchromene;21421-66-9;2H-1-Benzopyran, 5,7-dimethoxy-2,2-dimethyl-;5,7-Dimethoxy-2,2-dimethyl-2H-chromene;DTXSID30175694;AKOS040735337;HY-W068430;CS-0069178;2,2-Dimethyl-5,7-dimethoxy-2H-1-benzopyran;D73759

Chemical Property of 5,7-Dimethoxy-2,2-dimethylchromene

Chemical Property:

• Vapor Pressure: 0.000424mmHg at 25°C
• Boiling Point: 325.9°Cat760mmHg
• Flash Point: 109.2°C
• Density: 1.063g/cm³
• XLogP3: 2.8
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 3
• Rotatable Bond Count: 2
• Exact Mass: 220.109944368
• Heavy Atom Count: 16
• Complexity: 272

Purity/Quality:

99% ^*data from raw suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

SDS file from LookChem

Useful:

• Canonical SMILES: CC1(C=CC2=C(O1)C=C(C=C2OC)OC)C

Technology Process of 5,7-Dimethoxy-2,2-dimethylchromene

There total 8 articles about 5,7-Dimethoxy-2,2-dimethylchromene 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: 97.0%

3,5-dimethoxyphenol (500-99-2) + 3,3-dimethyl acrylaldehyde (107-86-8) → 5,7-dimethoxy-2,2-dimethyl-2H-1-benzopyran (21421-66-9)

Guidance literature:

With benzoic acid; phenylboronic acid; In n-heptane; at 100 ℃; for 17h; Sealed tube;

DOI:10.1039/c6ob01026a

Reference yield: 80.0%

5,7-dimethoxy-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran (67523-56-2) → 5,7-dimethoxy-2,2-dimethyl-2H-1-benzopyran (21421-66-9)

Guidance literature:

With 2,3-dicyano-5,6-dichloro-p-benzoquinone; In benzene; Heating;

DOI:10.1055/s-1982-29707

Reference yield: 31.0%

2-hydroxy-4,6-dimethoxybenzaldehyde (708-76-9) + ethyl 3-methylbut-2-enoate (638-10-8) → 5,7-dimethoxy-2,2-dimethyl-2H-1-benzopyran (21421-66-9)

Guidance literature:

With potassium carbonate; In N,N-dimethyl-formamide; at 130 ℃; for 8h;

DOI:10.1246/bcsj.55.1153

upstream raw materials:

5,7-dimethoxy-2,2-dimethylchroman-4-ol

3-chloro-3-methylbut-1-yne

3,5-dimethoxyphenol

2-hydroxy-4,6-dimethoxybenzaldehyde

Downstream raw materials:

6-(2-N,N-acetylmethylaminobenzoyl)-5,7-dimethoxy-2,2-dimethylchromene

6-(2-N-acetylaminobenzoyl)-5,7-dimethoxy-2,2-dimethylchromene

8-(2-N-methyl-aminobenzoyl)-5,7-dimethoxy-2,2-dimethylchromene

6-(2-N-methylaminobenzoyl)-5,7-dimethoxy-2,2-dimethylchromene