diethyl 3,4-bis(4-methylphenyl)thieno[2,3-b]thiophene-2,5-dicarboxylate

Base Information

Chemical Name:diethyl 3,4-bis(4-methylphenyl)thieno[2,3-b]thiophene-2,5-dicarboxylate
CAS No.:257953-67-6
Molecular Formula:C₂₆H₂₄O₄S₂
Molecular Weight:464.606
Hs Code.:

Synonyms:diethyl 3,4-bis(4-methylphenyl)thieno[2,3-b]thiophene-2,5-dicarboxylate

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Chemical Property of diethyl 3,4-bis(4-methylphenyl)thieno[2,3-b]thiophene-2,5-dicarboxylate

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Technology Process of diethyl 3,4-bis(4-methylphenyl)thieno[2,3-b]thiophene-2,5-dicarboxylate

There total 3 articles about diethyl 3,4-bis(4-methylphenyl)thieno[2,3-b]thiophene-2,5-dicarboxylate 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: 70.0%

: 281663-92-1
[1-ethoxycarbonylmethylsulfanyl-2-(4-methyl-benzoyl)-3-oxo-3-p-tolyl-propenylsulfanyl]-acetic acid ethyl ester

: 257953-67-6
diethyl 3,4-bis(4-methylphenyl)thieno[2,3-b]thiophene-2,5-dicarboxylate

Guidance literature:: With sodium ethanolate; In ethanol; at 20 ℃; for 0.75h;
DOI:10.1080/00397910008087211

Reference yield: 61.0%

: 75-15-0,12122-00-8
carbon disulfide

: 3594-36-3
1,3-bis(p-methylphenyl)-1,3-propanedione

: 105-36-2
ethyl bromoacetate

: 257953-67-6
diethyl 3,4-bis(4-methylphenyl)thieno[2,3-b]thiophene-2,5-dicarboxylate

Guidance literature:: carbon disulfide; 1,3-bis(p-methylphenyl)-1,3-propanedione; With potassium fluoride; In N,N-dimethyl-formamide; at 20 ℃;

ethyl bromoacetate; In N,N-dimethyl-formamide; for 2h;
DOI:10.1055/s-1999-3631

Reference yield:

: 3594-36-3
1,3-bis(p-methylphenyl)-1,3-propanedione

: 257953-67-6
diethyl 3,4-bis(4-methylphenyl)thieno[2,3-b]thiophene-2,5-dicarboxylate

Guidance literature:: Multi-step reaction with 2 steps

1: 66 percent / KF / dimethylformamide / 2 h / 20 °C

2: 70 percent / sodium ethoxide / ethanol / 0.75 h / 20 °C

With potassium fluoride; sodium ethanolate; In ethanol; N,N-dimethyl-formamide; 2: Dieckmann cyclization;
DOI:10.1080/00397910008087211