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5-Amino-2,4-di-tert-butylphenol is an organic compound characterized by the presence of an amino group attached to a phenol ring, with two tert-butyl groups attached to the 2nd and 4th positions. This structure endows it with unique chemical properties and reactivity, making it a valuable intermediate in the synthesis of various pharmaceutical compounds.

873055-58-4

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873055-58-4 Usage

Uses

Used in Pharmaceutical Industry:
5-Amino-2,4-di-tert-butylphenol is used as a key intermediate in the synthesis of ivacaftor, a medication designed to treat cystic fibrosis. It plays a crucial role in the condensation reaction with oxo dihydroquinoline carboxylic acid, leading to the formation of the final drug product. This application is significant as it contributes to the development of treatments for a genetic disorder that affects the respiratory and digestive systems, improving the quality of life for patients with cystic fibrosis.

Check Digit Verification of cas no

The CAS Registry Mumber 873055-58-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,3,0,5 and 5 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 873055-58:
(8*8)+(7*7)+(6*3)+(5*0)+(4*5)+(3*5)+(2*5)+(1*8)=184
184 % 10 = 4
So 873055-58-4 is a valid CAS Registry Number.

873055-58-4SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 18, 2017

Revision Date: Aug 18, 2017

1.Identification

1.1 GHS Product identifier

Product name 5-amino-2,4-ditert-butylphenol

1.2 Other means of identification

Product number -
Other names PHE063

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:873055-58-4 SDS

873055-58-4Synthetic route

2,4-di-tert-butyl-5-nitro-phenol
873055-57-3

2,4-di-tert-butyl-5-nitro-phenol

5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

Conditions
ConditionsYield
With ammonium formate; 5%-palladium/activated carbon In ethanol for 2h; Heating / reflux;100%
With ammonium formate; palladium on carbon In ethanol for 2h; Reflux;100%
With 5%-palladium/activated carbon; ammonium formate In ethanol for 2h; Reflux;100%
N-(2,4-di-tert-butyl-5-hydroxyphenyl)acetamide

N-(2,4-di-tert-butyl-5-hydroxyphenyl)acetamide

5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

Conditions
ConditionsYield
With hydrogenchloride In ethanol; water for 6h; Reflux;89%
With hydrogenchloride In ethanol; water for 12h; Reflux;88%
2,4-di-tert-butyl-5-nitro-phenol
873055-57-3

2,4-di-tert-butyl-5-nitro-phenol

pyrographite
7440-44-0

pyrographite

5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

Conditions
ConditionsYield
With ammonium formate In ethanol
carbonic acid 2,4-di(tert-butyl)-5-nitrophenyl ester methyl ester
873055-55-1

carbonic acid 2,4-di(tert-butyl)-5-nitrophenyl ester methyl ester

5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: hydrogenchloride; KOH / methanol
2: ammonium formate / ethanol
View Scheme
Multi-step reaction with 2 steps
1: potassium hydroxide / methanol
2: palladium 10% on activated carbon; hydrogen / methanol / 2 h / 25 - 30 °C
View Scheme
Multi-step reaction with 2 steps
1.1: potassium hydroxide / methanol / 2 h / 25 °C
1.2: pH 2 - 3
2.1: ammonium formate; 5%-palladium/activated carbon / ethanol / 2 h / Reflux
View Scheme
Multi-step reaction with 2 steps
1.1: methanol; potassium hydroxide / 2 h / 20 °C
1.2: pH 2 - 3
2.1: ammonium formate / 5% palladium over charcoal / ethanol / 2 h / Heating / reflux
View Scheme
carbonic acid 2,4-di-tert-butyl-phenyl ester methyl ester
873055-54-0

carbonic acid 2,4-di-tert-butyl-phenyl ester methyl ester

5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: sulfuric acid; nitric acid; sodium sulfate / hexane; water
2: hydrogenchloride; KOH / methanol
3: ammonium formate / ethanol
View Scheme
Multi-step reaction with 3 steps
1: nitric acid / (2S)-N-methyl-1-phenylpropan-2-amine hydrate; sulfuric acid
2: hydrogenchloride; KOH / methanol
3: ammonium formate / ethanol
View Scheme
Multi-step reaction with 3 steps
1.1: sulfuric acid; nitric acid / 2 h / 25 °C / Cooling
2.1: potassium hydroxide / methanol / 2 h / 25 °C
2.2: pH 2 - 3
3.1: ammonium formate; 5%-palladium/activated carbon / ethanol / 2 h / Reflux
View Scheme
2,4-di-tert-Butylphenol
96-76-4

2,4-di-tert-Butylphenol

5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: triethylamine; dmap / dichloromethane / 2 h / 0 - 5 °C
1.2: 1.5 h / 0 - 5 °C
2.1: potassium hydroxide / methanol
3.1: palladium 10% on activated carbon; hydrogen / methanol / 2 h / 25 - 30 °C
View Scheme
Multi-step reaction with 4 steps
1.1: dmap; triethylamine / dichloromethane / 16 h / 0 - 25 °C
2.1: sulfuric acid; nitric acid / 2 h / 25 °C / Cooling
3.1: potassium hydroxide / methanol / 2 h / 25 °C
3.2: pH 2 - 3
4.1: ammonium formate; 5%-palladium/activated carbon / ethanol / 2 h / Reflux
View Scheme
Multi-step reaction with 3 steps
1.1: dmap; triethylamine / dichloromethane / 0 - 20 °C
2.1: sulfuric acid; nitric acid / 2 h / 50 °C / Cooling with ice
2.2: 2 h / 20 °C
3.1: 5%-palladium/activated carbon; ammonium formate / ethanol / 2 h / Reflux
View Scheme
m-Hydroxyaniline
591-27-5

m-Hydroxyaniline

5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: acetic acid / 2 h / 60 °C
2: sulfuric acid / toluene / 12 h / 10 - 30 °C
3: hydrogenchloride / ethanol; water / 12 h / Reflux
View Scheme
Multi-step reaction with 3 steps
1: acetic acid / 2 h / 50 °C
2: sulfuric acid / dichloromethane / 48 h / 20 °C
3: hydrogenchloride / ethanol; water / 6 h / Reflux
View Scheme
2,4-di-tert-butylphenyl ethyl carbonate

2,4-di-tert-butylphenyl ethyl carbonate

5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: sulfuric acid / 0 - 5 °C
1.2: 10 h / 0 - 10 °C
1.3: 0 - 30 °C
2.1: hydrogen / isopropyl alcohol / 20 °C / 3000.3 - 4500.45 Torr
View Scheme
meta-hydroxyacetanilide
621-42-1

meta-hydroxyacetanilide

5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: sulfuric acid / dichloromethane / 48 h / 20 °C
2: hydrogenchloride / ethanol; water / 6 h / Reflux
View Scheme
trimethylsilylazide
4648-54-8

trimethylsilylazide

5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

(5-azido-2,4-di-tert-butylphenoxy)trimethylsilane

(5-azido-2,4-di-tert-butylphenoxy)trimethylsilane

Conditions
ConditionsYield
With tert.-butylnitrite In acetonitrile at 0 - 20℃; for 18h; Inert atmosphere;73%
5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

4-oxo-1,4-dihydroquinoline-3-carboxylic acid
13721-01-2

4-oxo-1,4-dihydroquinoline-3-carboxylic acid

ivacaftor
873054-44-5

ivacaftor

Conditions
ConditionsYield
With O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate; triethylamine In N,N-dimethyl-formamide71%
With triethylamine; N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate In dichloromethane at 25℃; for 12h;71%
With benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; triethylamine In N,N-dimethyl-formamide at 20℃;71%
5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

4-chloroquinoline-3-carbonyl chloride
765222-35-3

4-chloroquinoline-3-carbonyl chloride

C24H27ClN2O2

C24H27ClN2O2

Conditions
ConditionsYield
With triethylamine In tetrahydrofuran at 20℃; for 2h;62%
5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

C10H5Br2NO

C10H5Br2NO

C24H27BrN2O2

C24H27BrN2O2

Conditions
ConditionsYield
With triethylamine In tetrahydrofuran at 20℃; for 2h;59%
5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

ivacaftor
873054-44-5

ivacaftor

Conditions
ConditionsYield
Stage #1: 4-oxo-1,4-dihydroquinoline-3-carboxylic acid With O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate; triethylamine In N,N-dimethyl-formamide at 20℃; for 0.166667h;
Stage #2: 5-amino-2-4-di-tert-butyl-phenol In N,N-dimethyl-formamide at 20℃;
52%
formaldehyd
50-00-0

formaldehyd

5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

2,4-di-tert-butyl-6-(N-methylamino)phenol
1085-21-8

2,4-di-tert-butyl-6-(N-methylamino)phenol

Conditions
ConditionsYield
With sodium cyanoborohydride In methanol for 3h; Reflux;15%
5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

7-oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-carboxylic acid
197367-75-2

7-oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-carboxylic acid

N-(2,4-di-tert-butyl-5-hydroxyphenyl)-7-oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-carboxamide
1161024-91-4

N-(2,4-di-tert-butyl-5-hydroxyphenyl)-7-oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-carboxamide

Conditions
ConditionsYield
Stage #1: 7-oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-carboxylic acid With triethylamine; HATU In tetrahydrofuran at 20℃; for 0.166667h;
Stage #2: 5-amino-2-4-di-tert-butyl-phenol In tetrahydrofuran at 65℃; for 16h;
7-ethyl-4-oxo-1,4-dihydropyrrolo[1,2-a]pyrimidine-3-carboxylic acid
1161025-08-6

7-ethyl-4-oxo-1,4-dihydropyrrolo[1,2-a]pyrimidine-3-carboxylic acid

5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

N-(2,4-di-tert-butyl-5-hydroxyphenyl)-7-ethyl-4-oxo-1,4-dihydropyrrolo[1,2-a]pyrimidine-3-carboxamide
1161025-00-8

N-(2,4-di-tert-butyl-5-hydroxyphenyl)-7-ethyl-4-oxo-1,4-dihydropyrrolo[1,2-a]pyrimidine-3-carboxamide

Conditions
ConditionsYield
Stage #1: 7-ethyl-4-oxo-1,4-dihydropyrrolo[1,2-a]pyrimidine-3-carboxylic acid With pyridine; 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane-2,4,6-trioxide In 2-methyltetrahydrofuran at 45℃; for 0.5h;
Stage #2: 5-amino-2-4-di-tert-butyl-phenol In 2-methyltetrahydrofuran at 45℃; for 16h;
5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

1-benzyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acide
35975-86-1

1-benzyl-1,4-dihydro-4-oxoquinoline-3-carboxylic acide

N-(2,4-di-tert-butyl-5-hydroxyphenyl)-1-benzyl-4-oxo-1,4-dihydroquinoline-3-carboxamide
1622228-86-7

N-(2,4-di-tert-butyl-5-hydroxyphenyl)-1-benzyl-4-oxo-1,4-dihydroquinoline-3-carboxamide

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine; HATU In N,N-dimethyl-formamide at 25 - 30℃; for 4h;15.5 g
5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

methyl chloroformate
79-22-1

methyl chloroformate

5-amino-2,4-di-tert-butylphenyl methyl carbonate
1182822-31-6

5-amino-2,4-di-tert-butylphenyl methyl carbonate

Conditions
ConditionsYield
With triethylamine In diethyl ether at 0 - 20℃;
5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

1-benzyl-3-(1-(2,4-di-tert-butyl-5-hydroxyphenyl)-1H-1,2,3-triazol-4-yl)quinolin-4(1H)-one

1-benzyl-3-(1-(2,4-di-tert-butyl-5-hydroxyphenyl)-1H-1,2,3-triazol-4-yl)quinolin-4(1H)-one

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: tert.-butylnitrite / acetonitrile / 18 h / 0 - 20 °C / Inert atmosphere
2: tetrabutyl ammonium fluoride / tetrahydrofuran / 2 h / 0 - 20 °C / Inert atmosphere
3: copper(ll) sulfate pentahydrate; sodium L-ascorbate / water; dichloromethane; tert-butyl alcohol / 24 h / 60 °C / Inert atmosphere
View Scheme
5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

3-(1-(2,4-di-tert-butyl-5-hydroxyphenyl)-1H-1,2,3-triazol-4-yl)quinolin-4(1H)-one

3-(1-(2,4-di-tert-butyl-5-hydroxyphenyl)-1H-1,2,3-triazol-4-yl)quinolin-4(1H)-one

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: tert.-butylnitrite / acetonitrile / 18 h / 0 - 20 °C / Inert atmosphere
2: tetrabutyl ammonium fluoride / tetrahydrofuran / 2 h / 0 - 20 °C / Inert atmosphere
3: copper(ll) sulfate pentahydrate; sodium L-ascorbate / water; dichloromethane; tert-butyl alcohol / 24 h / 60 °C / Inert atmosphere
4: palladium(II) hydroxide; ammonium formate / N,N-dimethyl-formamide / 8.5 h / 80 °C / Inert atmosphere
View Scheme
5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

5-azido-2,4-di-tertbutylphenol

5-azido-2,4-di-tertbutylphenol

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: tert.-butylnitrite / acetonitrile / 18 h / 0 - 20 °C / Inert atmosphere
2: tetrabutyl ammonium fluoride / tetrahydrofuran / 2 h / 0 - 20 °C / Inert atmosphere
View Scheme
5-amino-2,4-di-tert-butyl-phenol
873055-58-4

5-amino-2,4-di-tert-butyl-phenol

C18H14ClNO3

C18H14ClNO3

N-(2,4-di-tert-butyl-5-hydroxyphenyl)-2-(3,4-dimethoxyphenyl)quinoline-4-carboxamide

N-(2,4-di-tert-butyl-5-hydroxyphenyl)-2-(3,4-dimethoxyphenyl)quinoline-4-carboxamide

Conditions
ConditionsYield
With dmap In N,N-dimethyl-formamide at 20℃;

873055-58-4Relevant academic research and scientific papers

METHODS OF TREATMENT FOR CYSTIC FIBROSIS

-

, (2020/06/05)

This application describes methods of treating cystic fibrosis or a CFTR mediated disease comprising administering Compound I or a pharmaceutically acceptable salt thereof. (I) The application also describes pharmaceutical compositions comprising Compound I or a pharmaceutically acceptable salt thereof and optionally comprising one or more additional CFTR modulating agents.

METHODS OF TREATMENT FOR CYSTIC FIBROSIS

-

, (2020/12/11)

This application describes methods of treating cystic fibrosis comprising administering Compound I:, a pharmaceutically acceptable salt thereof, or a pharmaceutical composition comprising any of the foregoing.

COMPOSITIONS AND METHODS FOR TREATMENT OF CYSTIC FIBROSIS

-

, (2019/01/22)

Compositions comprising Compound I of the formula (I) and methods of treating cystic fibrosis comprising administering Compound I. Compositions comprising a pharmaceutically acceptable salt of Compound I and methods of treating cystic fibrosis comprising administering a pharmaceutically acceptable salt of Compound I.

METHODS OF TREATMENT FOR CYSTIC FIBROSIS

-

, (2019/02/06)

Compound I of the formula (I) and/or pharmaceutically acceptable salt(s) of Compound I comprised in a pharmaceutical composition and methods of using the same to treat cystic fibrosis.

Evaluation of 1,2,3-Triazoles as Amide Bioisosteres In Cystic Fibrosis Transmembrane Conductance Regulator Modulators VX-770 and VX-809

Doiron, Jake E.,Le, Christina A.,Ody, Britton K.,Brace, Jonathon B.,Post, Savannah J.,Thacker, Nathan L.,Hill, Harrison M.,Breton, Gary W.,Mulder, Matthew J.,Chang, Sichen,Bridges, Thomas M.,Tang, Liping,Wang, Wei,Rowe, Steven M.,Aller, Stephen G.,Turlington, Mark

, p. 3662 - 3674 (2019/02/19)

The 1,2,3-triazole has been successfully utilized as an amide bioisostere in multiple therapeutic contexts. Based on this precedent, triazole analogues derived from VX-809 and VX-770, prominent amide-containing modulators of the cystic fibrosis transmembrane conductance regulator (CFTR), were synthesized and evaluated for CFTR modulation. Triazole 11, derived from VX-809, displayed markedly reduced efficacy in F508del-CFTR correction in cellular TECC assays in comparison to VX-809. Surprisingly, triazole analogues derived from potentiator VX-770 displayed no potentiation of F508del, G551D, or WT-CFTR in cellular Ussing chamber assays. However, patch clamp analysis revealed that triazole 60 potentiates WT-CFTR similarly to VX-770. The efficacy of 60 in the cell-free patch clamp experiment suggests that the loss of activity in the cellular assay could be due to the inability of VX-770 triazole derivatives to reach the CFTR binding site. Moreover, in addition to the negative impact on biological activity, triazoles in both structural classes displayed decreased metabolic stability in human microsomes relative to the analogous amides. In contrast to the many studies that demonstrate the advantages of using the 1,2,3-triazole, these findings highlight the negative impacts that can arise from replacement of the amide with the triazole and suggest that caution is warranted when considering use of the 1,2,3-triazole as an amide bioisostere.

METHODS OF TREATMENT FOR CYSTIC FIBROSIS

-

, (2019/02/06)

Methods of treating cystic fibrosis comprising administering at least Compound (I) of the formula. Pharmaceutical compositions containing a pharmaceutically acceptable salt of at least Compound I and methods of treating cystic fibrosis comprising administering a pharmaceutically acceptable salt of at least Compound (I).

CRYSTALLINE FORMS AND COMPOSITIONS OF CFTR MODULATORS

-

, (2019/05/07)

Crystalline Forms of Compound I: and pharmaceutically acceptable salts thereofare disclosed. Pharmaceutical compositions comprising the same, methods of treating cystic fibrosis using the same, and methods for making the same are also disclosed.

COMPOSITIONS FOR TREATING CYSTIC FIBROSIS

-

, (2019/06/23)

A single tablet comprising Compound I:. Methods of treating cystic fibrosis comprising administering one or more of such single tablets to a patient.

PHARMACEUTICAL COMPOSITIONS FOR TREATING CYSTIC FIBROSIS

-

, (2019/08/20)

A pharmaceutical composition comprising Compound I: Methods of treating cystic fibrosis comprising administering one or more of such pharmaceutical compositions to a patient.

CRYSTALLINE FORMS OF MODULATORS OF CFTR

-

, (2019/10/19)

Crystalline Forms of Compound (I); crystalline Forms of Compound (II) and crystalline forms of pharmaceutically acceptable salts of any of the foregoing are disclosed. Pharmaceutical compositions comprising the same, methods of treating cystic fibrosis using the same, and methods for making the same are also disclosed.

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