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inquiry1,4-Benzenedicarboxylicacid, 2,3,5,6-tetramethyl- CAS NO.14458-05-0 Application:1,4-Benzenedicarboxylicacid, 2,3,5,6-tetramethyl- CAS NO.14458-05-0
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inquiryAppearance:solid or liquid Storage:sealed in cool and dry place Package:As customer's requested Application:Pharma Intermediate Transportation:by courier/air/sea Port:Any port in China
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inquiry1,4-Benzenedicarboxylicacid, 2,3,5,6-tetramethyl- CAS NO.14458-05-0Appearance:powder Storage:keep dry Package:25kg/bag or follow your requirement Application:pharmaceutical intermediates Transportation:By express (Door to door) such as FEDEX, DHL, EM
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inquiry2,3,5,6-tetramethyl-p-xylene-α,α'-diol
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
With chromium(VI) oxide; sulfuric acid In water; acetone at 0 - 20℃; | 84% |
With chromium(VI) oxide; sulfuric acid In water; acetone at 0 - 20℃; | 16% |
With chromium(VI) oxide; sulfuric acid | |
With chromium(VI) oxide; hydrogenchloride; sulfuric acid In water |
carbon dioxide
Potassium benzoate
A
terephthalic acid
B
2-methylterephthalic acid
C
2,5-dimethylterephthalic acid
D
2,3,5-trimethyl-1,4-dicarboxybenzene
E
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
With potassium acetate; potassium phthalate; zinc(II) oxide at 450℃; under 25858.1 Torr; Henkel Reaction; | A 50% B n/a C n/a D n/a E n/a |
2,3,5,6-tetramethyl-1,4-benzenedicarboxaldehyde
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
With potassium permanganate |
2,2-dimethylvaleroyl chloride
2,3,5,6-tetramethyl-p-xylene-α,α'-diol
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
With sulfuric acid In water; acetone |
carbon dioxide
1,4-dibromodurene
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
Stage #1: 1,4-dibromodurene With tert.-butyl lithium In diethyl ether at -78 - 20℃; Inert atmosphere; Stage #2: carbon dioxide In diethyl ether at -78℃; for 0.5h; Stage #3: With hydrogenchloride In diethyl ether; water |
1,2,4,5-tetramethylbenzene
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1.1: sodium chloride; hydrogenchloride / water / 5 h / 120 °C 1.2: 24 h / Reflux 2.1: acetic acid; potassium acetate / 24 h / 120 °C 3.1: potassium hydroxide / ethanol / 24 h / 90 °C 4.1: chromium(VI) oxide; sulfuric acid / water; acetone / 0 - 20 °C View Scheme | |
Multi-step reaction with 4 steps 1: sodium chloride; zinc(II) chloride; hydrogenchloride / water / 120 °C 2: potassium acetate / 120 °C 3: ethanol; potassium hydroxide / 90 °C 4: chromium(VI) oxide; sulfuric acid; hydrogenchloride / water View Scheme | |
Multi-step reaction with 4 steps 1: sodium chloride; hydrogenchloride / water / 31 h / 120 °C 2: acetic acid / 24 h / 120 °C 3: potassium hydroxide; water / tetrahydrofuran; ethanol / 24 h / 90 °C 4: chromium(VI) oxide; sulfuric acid / water; acetone / 0 - 20 °C View Scheme |
1,4-bis(chloromethyl)-2,3,5,6-tetramethylbenzene
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: acetic acid; potassium acetate / 24 h / 120 °C 2: potassium hydroxide / ethanol / 24 h / 90 °C 3: chromium(VI) oxide; sulfuric acid / water; acetone / 0 - 20 °C View Scheme | |
Multi-step reaction with 3 steps 1: potassium acetate / 120 °C 2: ethanol; potassium hydroxide / 90 °C 3: chromium(VI) oxide; sulfuric acid; hydrogenchloride / water View Scheme | |
Multi-step reaction with 3 steps 1: acetic acid / 24 h / 120 °C 2: potassium hydroxide; water / tetrahydrofuran; ethanol / 24 h / 90 °C 3: chromium(VI) oxide; sulfuric acid / water; acetone / 0 - 20 °C View Scheme |
(2,3,5,6-tetramethyl-1,4-phenylene)bis(methylene) diacetate
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: ethanol; potassium hydroxide / 90 °C 2: chromium(VI) oxide; sulfuric acid; hydrogenchloride / water View Scheme |
1,4-diaza-bicyclo[2.2.2]octane
terephthalic acid
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide at 120℃; for 48h; | 86% |
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
Stage #1: 2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid; K(2 - x)(NMe4)x[I2Mo10O10S10(OH)10(H2O)5]·20H2O With potassium hydroxide In water at 50℃; for 0.5h; pH=4.5; Stage #2: cesium chloride In water at 20℃; | 83% |
1,4-diaza-bicyclo[2.2.2]octane
terephthalic acid
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide at 120℃; for 48h; | 80% |
potassium permanganate
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
manganese (II) acetate tetrahydrate
Conditions | Yield |
---|---|
With acetic acid In N,N-dimethyl-formamide at 45℃; | 80% |
tris(4-(pyridin-4-yl) phenyl) amine
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
In methanol; N,N-dimethyl-formamide at 60℃; for 48h; | 77% |
1,4-diaza-bicyclo[2.2.2]octane
terephthalic acid
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide at 120℃; for 48h; | 73% |
1,4-diaza-bicyclo[2.2.2]octane
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide at 120℃; for 48h; | 68% |
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
tetramethlyammonium chloride
Conditions | Yield |
---|---|
With HCl In water aq. soln. of KOH (0.34 mmol) was added to a suspn. of H2TMT (0.17 mmol) in H2O; the soln. was added to a suspn. of Mo-contg. compd. (0.21 mmol) in H2O; pH=4.5 (HCl or KOH addn.); the mixt. was heated to 50°C for 15 min; NMe4Cl (0.45 mmol) addn.; the mixt. was slowly evapd. in air and clarified by centrifugation; after 1 d crystals were obtained, isolated by filtration, washed by water and dried in air; elem. anal.; | 57% |
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
N,N-dimethyl-formamide
Conditions | Yield |
---|---|
In ethanol; N,N-dimethyl-formamide Zn-contg. compd. (0.07 mmol) and a ligand (0.045 mmol) were suspended ina mixed solvent of DMF and EtOH and heated in an unsealed glass bottle at 75°C for 2 d; crystals were collected, washed with EtOH and dried in the air; | 56% |
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
In ethanol; water High Pressure; Zn-contg. compd. (0.07 mmol) and a ligand (0.045 mmol) were suspended ina mixed solvent of H2O and EtOH and heated in a teflon-lined steel bomb at 140°C for 3 d; crystals were collected, washed with water and dried in the air; elem. anal.; | 54% |
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
N,N-dimethyl-formamide
[Mn(tetramethylterephthalic acid(-2H))(dimethylformamide)]n
Conditions | Yield |
---|---|
In ethanol; water at 90℃; for 66.6667h; Heating; | 48% |
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
1,4,5,6,7,8-hexahydro-naphthalene-2,3-dicarboxylic acid
Conditions | Yield |
---|---|
With potassium hydroxide |
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Z-L-phenylalanyl-L-alanyl bromomethyl ketone
Conditions | Yield |
---|---|
With potassium fluoride 1.) DMF, RT, 3 min, 2.) DMF, RT, 3 h; Yield given. Multistep reaction. Yields of byproduct given; |
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
chromium
Conditions | Yield |
---|---|
With HF; H2O In water High Pressure; Cr:2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid:HF:H2O = 1:1:1:280, stirred, autoclaved at 493 K for 4 d; |
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
N,N-dimethyl-formamide
Conditions | Yield |
---|---|
With trimethylamine In N,N-dimethyl-formamide; chlorobenzene slow diffusion of chlorobenzene-trimethylamine mixt. (700:1 v/v) into soln. of Zn(NO3)2*6H2O and 2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid (1 equiv.) in DMF-chlorobenzene; room temp.; 4-7 d; elem. anal.; |
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide dissolving of 2,3,5,6-tetramethylbenzene-1,4-dicarboxylic acid and Zn(NO3)2*6H2O in DMF; heating at 70°C for 48 h; |
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
N,N-dimethyl-formamide
Conditions | Yield |
---|---|
In ethanol; water; N,N-dimethyl-formamide High Pressure; solvothermal reaction of 2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid and Tm(NO3)2*3H2O in DMF/EtOH/H2O; |
1,10-Phenanthroline
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
N,N-dimethyl-formamide
Conditions | Yield |
---|---|
In ethanol; water; N,N-dimethyl-formamide High Pressure; solvothermal reaction of 2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid, 1,10-phenanthroline, and ErCl3*6H2O in DMF/EtOH/H2O; |
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
With sodium hydroxide In water; N,N-dimethyl-formamide at 100℃; for 12h; |
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
With thionyl chloride Inert atmosphere; Reflux; | 3.5 g |
1,4-diaza-bicyclo[2.2.2]octane
terephthalic acid
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide at 120℃; |
1,4-diaza-bicyclo[2.2.2]octane
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide at 120℃; | |
In ethanol; N,N-dimethyl-formamide at 20 - 120℃; for 50 - 51h; High pressure; |
4,4'-bipyridine
2,3,5,6-tetramethyl-1,4-benzenedicarboxylic acid
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide at 20 - 120℃; for 51h; |
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