5-BROMO-2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE

Base Information

• Chemical Name: 5-BROMO-2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE
• CAS No.: 302554-82-1
• Molecular Formula: C₆H₅BrO₂S
• Molecular Weight: 221.075
• Hs Code.: 2934999090
• Mol file: 302554-82-1.mol

Synonyms:2-Bromo-3,4-ethylenedioxythiophene

Chemical Property of 5-BROMO-2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE

Chemical Property:

• Boiling Point: 267.3±40.0 °C(Predicted)
• PSA: 46.70000
• Density: 1.782±0.06 g/cm3(Predicted)
• LogP: 2.28180

Purity/Quality:

98% ^*data from raw suppliers

5-Bromo-2,3-dihydrothieno[3,4-b]-1,4-dioxin 95% ^*data from reagent suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

SDS file from LookChem

Useful:

Technology Process of 5-BROMO-2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE

There total 1 articles about 5-BROMO-2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE 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: 92.0%

3,4-(ethylenedioxy)thiophene (126213-50-1) → 5-bromo-2,3-dihydrothieno[3,4-b][1,4]dioxine (302554-82-1)

Guidance literature:

With N-Bromosuccinimide; acetic acid; In tetrahydrofuran; at 0 - 20 ℃; for 2h; Schlenk technique;

DOI:10.1021/acs.joc.8b00915

Reference yield: 75.0%

5-bromo-2,3-dihydrothieno[3,4-b][1,4]dioxine (302554-82-1) + phenol (108-95-2,27073-41-2) → C12H10O3S

Guidance literature:

With potassium carbonate; In dimethyl sulfoxide; at 70 ℃; Inert atmosphere;

Reference yield: 72.0%

p-Iodophenol (540-38-5) + 5-bromo-2,3-dihydrothieno[3,4-b][1,4]dioxine (302554-82-1) → C12H9IO3S

Guidance literature:

With potassium carbonate; In N,N-dimethyl-formamide; at 80 ℃; Reflux; Inert atmosphere;

upstream raw materials:

3,4-(ethylenedioxy)thiophene

Downstream raw materials:

5-chloro-3,4-ethylenedioxythiophene-2-carbaldehyde

7-bromo-2,3-dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde

2,2'-bis(3,4-ethylenedioxythiophene)

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