2,3-bis-(4-ethynylphenyl)-5,7-bis(4-ethynylphenyl)thieno[3,4-b]pyrazine

Base Information

Chemical Name:2,3-bis-(4-ethynylphenyl)-5,7-bis(4-ethynylphenyl)thieno[3,4-b]pyrazine
CAS No.:1309650-23-4
Molecular Formula:C₃₈H₂₀N₂S
Molecular Weight:536.656
Hs Code.:

Synonyms:2,3-bis-(4-ethynylphenyl)-5,7-bis(4-ethynylphenyl)thieno[3,4-b]pyrazine

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Chemical Property of 2,3-bis-(4-ethynylphenyl)-5,7-bis(4-ethynylphenyl)thieno[3,4-b]pyrazine

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Technology Process of 2,3-bis-(4-ethynylphenyl)-5,7-bis(4-ethynylphenyl)thieno[3,4-b]pyrazine

There total 3 articles about 2,3-bis-(4-ethynylphenyl)-5,7-bis(4-ethynylphenyl)thieno[3,4-b]pyrazine 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: 98.0%

: 1309650-22-3
2,3-bis-(4-(trimethylsilylethynyl)phenyl)-5,7-bis-(4-(trimethylsilyl)ethynylphenyl)thieno[3,4-b]pyrazine

: 1309650-23-4
2,3-bis-(4-ethynylphenyl)-5,7-bis(4-ethynylphenyl)thieno[3,4-b]pyrazine

Guidance literature:: With ammonium fluoride; tetrabutyl ammonium fluoride; In tetrahydrofuran; at 20 ℃; for 2h; Inert atmosphere;
DOI:10.1016/j.dyepig.2011.05.029

Reference yield:

: 1247952-42-6
C₁₆H₈Br₂N₂O₄S

: 1309650-23-4
2,3-bis-(4-ethynylphenyl)-5,7-bis(4-ethynylphenyl)thieno[3,4-b]pyrazine

Guidance literature:: Multi-step reaction with 4 steps

1: hydrogenchloride; tin / ethanol; water / 6 h / 50 °C / Inert atmosphere

2: toluene-4-sulfonic acid / chloroform / 20 °C

3: copper(l) iodide; bis-triphenylphosphine-palladium(II) chloride; triethylamine; triphenylphosphine / tetrahydrofuran / 48 h / 45 °C / Inert atmosphere

4: ammonium fluoride; tetrabutyl ammonium fluoride / tetrahydrofuran / 2 h / 20 °C / Inert atmosphere

With hydrogenchloride; bis-triphenylphosphine-palladium(II) chloride; ammonium fluoride; tin; copper(l) iodide; tetrabutyl ammonium fluoride; toluene-4-sulfonic acid; triethylamine; triphenylphosphine; In tetrahydrofuran; ethanol; chloroform; water;
DOI:10.1016/j.dyepig.2011.05.029

Reference yield:

: 1309650-20-1
2,5-bis-(4-bromophenyl)-3,4-thiophene-3,4-diamine

: 1309650-23-4
2,3-bis-(4-ethynylphenyl)-5,7-bis(4-ethynylphenyl)thieno[3,4-b]pyrazine

Guidance literature:: Multi-step reaction with 3 steps

1: toluene-4-sulfonic acid / chloroform / 20 °C

2: copper(l) iodide; bis-triphenylphosphine-palladium(II) chloride; triethylamine; triphenylphosphine / tetrahydrofuran / 48 h / 45 °C / Inert atmosphere

3: ammonium fluoride; tetrabutyl ammonium fluoride / tetrahydrofuran / 2 h / 20 °C / Inert atmosphere

With bis-triphenylphosphine-palladium(II) chloride; ammonium fluoride; copper(l) iodide; tetrabutyl ammonium fluoride; toluene-4-sulfonic acid; triethylamine; triphenylphosphine; In tetrahydrofuran; chloroform;
DOI:10.1016/j.dyepig.2011.05.029