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6283-25-6 Usage

Chemical Properties

yellow powder

Check Digit Verification of cas no

The CAS Registry Mumber 6283-25-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,2,8 and 3 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 6283-25:
(6*6)+(5*2)+(4*8)+(3*3)+(2*2)+(1*5)=96
96 % 10 = 6
So 6283-25-6 is a valid CAS Registry Number.
InChI:InChI=1/C6H5ClN2O2/c7-5-2-1-4(9(10)11)3-6(5)8/h1-3H,8H2

6283-25-6 Well-known Company Product Price

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  • Alfa Aesar

  • (A15102)  2-Chloro-5-nitroaniline, 98%   

  • 6283-25-6

  • 100g

  • 208.0CNY

  • Detail
  • Alfa Aesar

  • (A15102)  2-Chloro-5-nitroaniline, 98%   

  • 6283-25-6

  • 500g

  • 866.0CNY

  • Detail
  • Alfa Aesar

  • (A15102)  2-Chloro-5-nitroaniline, 98%   

  • 6283-25-6

  • 2500g

  • 3579.0CNY

  • Detail

6283-25-6SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017

1.Identification

1.1 GHS Product identifier

Product name 2-Chloro-5-nitro-benzamine

1.2 Other means of identification

Product number -
Other names Benzenamine, 2-chloro-5-nitro-

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:6283-25-6 SDS

6283-25-6Synthetic route

2-Chloroaniline
95-51-2

2-Chloroaniline

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

Conditions
ConditionsYield
With sulfuric acid; uronium nitrate at 0 - 10℃; for 1h;76%
With sulfuric acid; guanidine nitrate at 0 - 5℃; for 1h;76%
With sulfuric acid; potassium nitrate
With sulfuric acid; nitric acid
With sulfuric acid durch Nitrierung;
2-nitro-4-amino-5-chlorobenzoic acid
136833-46-0

2-nitro-4-amino-5-chlorobenzoic acid

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

Conditions
ConditionsYield
With hydrogenchloride Heating;70%
1-chloro-2,4-dinitro-benzene
97-00-7

1-chloro-2,4-dinitro-benzene

A

4-Chloro-3-nitroaniline
635-22-3

4-Chloro-3-nitroaniline

B

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

Conditions
ConditionsYield
With hydrogen; iron; acetic acid; palladium dichloride In ethanol at 20 - 25℃; under 258.6 - 2327.2 Torr;A n/a
B 61%
With benzophenone; triethylamine In isopropyl alcohol for 2h; Product distribution; Irradiation;A 18%
B n/a
With hydrogenchloride; ethanol; tin(ll) chloride
2-bromo 5-nitroaniline
10403-47-1

2-bromo 5-nitroaniline

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

Conditions
ConditionsYield
With trans-bis(glycinato)copper(II) monohydrate; tetramethlyammonium chloride In ethanol at 100℃; for 30h; Finkelstein Reaction; Schlenk technique; Inert atmosphere;55%
2-chloro-5-nitro-benzamide
16588-15-1

2-chloro-5-nitro-benzamide

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

Conditions
ConditionsYield
With sodium hydroxide; bromine
N-(o-chlorophenyl)-phthalimide
22698-95-9

N-(o-chlorophenyl)-phthalimide

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

Conditions
ConditionsYield
With sulfuric acid; nitric acid Erhitzen des Reaktionsprodukts mit wss.Natronlauge;
N-(2-chlorophenyl)acetamide
533-17-5

N-(2-chlorophenyl)acetamide

A

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

B

2-Chloro-4-nitroaniline
121-87-9

2-Chloro-4-nitroaniline

Conditions
ConditionsYield
With sulfuric acid; nitric acid man waescht den Niederschlag mit Wasser aus und destilliert mit Natronlauge; die ueberdestillierten Basen trennt man durch Krystallisation aus Ligroin;
nitric acid
7697-37-2

nitric acid

2-Chloroaniline
95-51-2

2-Chloroaniline

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

sulfuric acid
7664-93-9

sulfuric acid

nitric acid
7697-37-2

nitric acid

2-Chloroaniline
95-51-2

2-Chloroaniline

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

1-chloro-2,4-dinitro-benzene
97-00-7

1-chloro-2,4-dinitro-benzene

acid

acid

A

4-Chloro-3-nitroaniline
635-22-3

4-Chloro-3-nitroaniline

B

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

Conditions
ConditionsYield
Electrolysis;
1-chloro-2,4-dinitro-benzene
97-00-7

1-chloro-2,4-dinitro-benzene

alkali

alkali

A

4-Chloro-3-nitroaniline
635-22-3

4-Chloro-3-nitroaniline

B

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

Conditions
ConditionsYield
Electrolysis;
Sodium; 5-chloro-2,4-dinitro-benzoate

Sodium; 5-chloro-2,4-dinitro-benzoate

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 73 percent / Ti3+-Triton B / H2O / Ambient temperature; pH 8.5 - 8.9
2: 70 percent / 20percent aq. HCl / Heating
View Scheme
4-chloro-3-cyanonitrobenzene
16588-02-6

4-chloro-3-cyanonitrobenzene

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: aq. NaOH solution; aqueous hydrogen peroxide
2: bromine; aqueous NaOH-solution
View Scheme
1-chloro-2,4-dinitro-benzene
97-00-7

1-chloro-2,4-dinitro-benzene

A

4-Chloro-3-nitroaniline
635-22-3

4-Chloro-3-nitroaniline

B

4-chloro-1,3-phenylenediamine
5131-60-2

4-chloro-1,3-phenylenediamine

C

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

D

m-phenylenediamine
108-45-2

m-phenylenediamine

Conditions
ConditionsYield
With hydrogen; Pt/γ-Fe2O3 nanocomposite In methanol at 29.84℃; under 75.0075 Torr; Product distribution;
1-chloro-2,4-dinitro-benzene
97-00-7

1-chloro-2,4-dinitro-benzene

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

Conditions
ConditionsYield
With propan-1-ol; potassium tert-butylate; C31H27ClN5O2Ru(1+)*ClO4(1-) at 100℃; for 12h;95 %Chromat.
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

chloroacetyl chloride
79-04-9

chloroacetyl chloride

2-chloro-N-(2-chloro-5-nitrophenyl)acetamide
108086-37-9

2-chloro-N-(2-chloro-5-nitrophenyl)acetamide

Conditions
ConditionsYield
With pyridine In dichloromethane at 0 - 20℃; for 12h;100%
With pyridine In dichloromethane at 0 - 20℃; for 12h;100%
In acetone at 20℃; for 1h;97%
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

m-Chlorobenzoyl chloride
618-46-2

m-Chlorobenzoyl chloride

3-chloro-N-(2-chloro-5-nitrophenyl)benzamide
346696-94-4

3-chloro-N-(2-chloro-5-nitrophenyl)benzamide

Conditions
ConditionsYield
With pyridine; dmap at 20℃; for 24h;100%
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

4-chloro-1,3-phenylenediamine
5131-60-2

4-chloro-1,3-phenylenediamine

Conditions
ConditionsYield
With hydrogen In hexane at 25℃; for 24h; Sealed tube; Autoclave;99%
With sodium tetrahydroborate In water at 50℃; for 0.0833333h; Green chemistry;98%
With sodium tetrahydroborate In water at 90℃;98%
di-tert-butyl dicarbonate
24424-99-5

di-tert-butyl dicarbonate

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

C11H13ClN2O4
879614-90-1

C11H13ClN2O4

Conditions
ConditionsYield
With dmap; triethylamine In tetrahydrofuran at 25℃;98.2%
5-(1-hydroxyethylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione
85920-63-4

5-(1-hydroxyethylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

C10H9ClN2O4

C10H9ClN2O4

Conditions
ConditionsYield
In benzene for 4h; Reflux;98%
cis,trans-2,5-dimethoxytetrahydrofuran
696-59-3

cis,trans-2,5-dimethoxytetrahydrofuran

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

1-(2-chloro-5-nitrophenyl)-1H-pyrrole
94033-72-4

1-(2-chloro-5-nitrophenyl)-1H-pyrrole

Conditions
ConditionsYield
In acetic acid at 120 - 130℃; for 0.5h;97.8%
With scandium tris(trifluoromethanesulfonate) In 1,4-dioxane at 100℃; for 0.5h; Clauson-Kaas condensation;80%
(5-chloromethyl-2-methylsulfanyl-pyrimidin-4-yl)-methyl-amine hydrochloride
878738-91-1

(5-chloromethyl-2-methylsulfanyl-pyrimidin-4-yl)-methyl-amine hydrochloride

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

{5-[(2-chloro-5-nitro-phenylamino)-methyl]-2-methylsulfanyl-pyrimidin-4-yl}-methyl-amine
878738-74-0

{5-[(2-chloro-5-nitro-phenylamino)-methyl]-2-methylsulfanyl-pyrimidin-4-yl}-methyl-amine

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine; sodium iodide In acetonitrile at 0 - 20℃; for 48h;97%
With N-ethyl-N,N-diisopropylamine; sodium iodide In acetonitrile at 0 - 20℃; for 48h;97%
4,6-dihydroxy-2-mercaptopyrimidine
504-17-6

4,6-dihydroxy-2-mercaptopyrimidine

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

orthoformic acid triethyl ester
122-51-0

orthoformic acid triethyl ester

5-[[(2-chloro-5-nitrophenyl)amino]methylene]-2-thioxodihydropyrimidine-4,6(1H,5H)-dione

5-[[(2-chloro-5-nitrophenyl)amino]methylene]-2-thioxodihydropyrimidine-4,6(1H,5H)-dione

Conditions
ConditionsYield
In butan-1-ol for 4h; Reflux;97%
formic acid
64-18-6

formic acid

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

N-(2-chloro-5-nitrophenyl)formamide
53666-48-1

N-(2-chloro-5-nitrophenyl)formamide

Conditions
ConditionsYield
at 100 - 105℃;96%
at 100 - 105℃;96%
at 150℃;
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

2-hydroxyethanethiol
60-24-2

2-hydroxyethanethiol

2-(2-amino-4-nitrophenylthio)ethanol
1202773-82-7

2-(2-amino-4-nitrophenylthio)ethanol

Conditions
ConditionsYield
With potassium carbonate In N,N-dimethyl-formamide at 20 - 60℃;96%
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

m-phenylenediamine
108-45-2

m-phenylenediamine

Conditions
ConditionsYield
With palladium 10% on activated carbon; hydrazine hydrate In methanol at 120℃; for 0.25h; Microwave irradiation;96%
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

1-chloro-4-nitro-2-nitrosobenzene
64918-66-7

1-chloro-4-nitro-2-nitrosobenzene

Conditions
ConditionsYield
With ammonium persulfate; sulfuric acid In water at 0℃; for 5h; Oxidation;95%
bei der Oxydation mit Caroscher Saeure;
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

phenylacetonitrile
140-29-4

phenylacetonitrile

2-Amino-3-phenyl-6-nitroindole

2-Amino-3-phenyl-6-nitroindole

Conditions
ConditionsYield
With potassium tert-butylate In dimethyl sulfoxide at 20℃; for 0.5h; Condensation;95%
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

acrolein
107-02-8

acrolein

8‐chloro‐5‐nitroquinoline
22539-55-5

8‐chloro‐5‐nitroquinoline

Conditions
ConditionsYield
With hydrogenchloride In water; toluene at 100℃; for 2h; Skraup Quinoline Synthesis;95%
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

benzoyl chloride
98-88-4

benzoyl chloride

N-(2-chloro-5-nitro-phenyl)-benzamide
205827-96-9

N-(2-chloro-5-nitro-phenyl)-benzamide

Conditions
ConditionsYield
With pyridine at 20℃; Inert atmosphere;95%
With pyridine Inert atmosphere;95%
With triethylamine In tetrahydrofuran at 20℃; for 15h;78%
phenylglyoxylyl chloride
25726-04-9

phenylglyoxylyl chloride

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

C14H9ClN2O4
1360432-87-6

C14H9ClN2O4

Conditions
ConditionsYield
With dmap In dichloromethane at 20℃; for 12h;94%
1,3-dimethylbarbituric acid
769-42-6

1,3-dimethylbarbituric acid

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

orthoformic acid triethyl ester
122-51-0

orthoformic acid triethyl ester

5-[[(2-chloro-5-nitrophenyl)amino]methylene]-1,3-dimethylpyrimidine-2,4,6(1H,3H,5H)-trione

5-[[(2-chloro-5-nitrophenyl)amino]methylene]-1,3-dimethylpyrimidine-2,4,6(1H,3H,5H)-trione

Conditions
ConditionsYield
In butan-1-ol for 4h; Reflux;92%
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

potassium thioacyanate
333-20-0

potassium thioacyanate

acetone
67-64-1

acetone

1-(2-chloro-5-nitrophenyl)-4,4,6-trimethyl-3,4-dihydropyrimidine-2(1H)-thione

1-(2-chloro-5-nitrophenyl)-4,4,6-trimethyl-3,4-dihydropyrimidine-2(1H)-thione

Conditions
ConditionsYield
Stage #1: potassium thioacyanate; acetone With thionyl chloride; 3-triphenylgermyl-3-phenylpropanoic acid Reflux;
Stage #2: H2NC6H3(Cl)NO2 for 1h;
90%
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

3-fluorobenzoyl chloride
1711-07-5

3-fluorobenzoyl chloride

N-(2-chloro-5-nitrophenyl)-3-fluorobenzamide
544701-78-2

N-(2-chloro-5-nitrophenyl)-3-fluorobenzamide

Conditions
ConditionsYield
With pyridine at 20℃; Inert atmosphere;90%
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

4-methoxy-benzoyl chloride
100-07-2

4-methoxy-benzoyl chloride

N-(2-Chloro-5-nitro-phenyl)-4-methoxy-benzamide
178970-17-7

N-(2-Chloro-5-nitro-phenyl)-4-methoxy-benzamide

Conditions
ConditionsYield
With pyridine at 100℃; for 0.5h;88%
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

C11H8ClNO

C11H8ClNO

N-(2-chloro-5-nitrophenyl)-2-methylquinoline-6-carboxamide

N-(2-chloro-5-nitrophenyl)-2-methylquinoline-6-carboxamide

Conditions
ConditionsYield
With pyridine at 20℃; for 18h;88%
2-bromoacetyl chloride
22118-09-8

2-bromoacetyl chloride

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

N-Bromoacetyl-2-chloro-5-nitroaniline
130916-46-0

N-Bromoacetyl-2-chloro-5-nitroaniline

Conditions
ConditionsYield
With pyridine In 1,4-dioxane for 3h; Ambient temperature;87%
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

4-chlorobenzonitrile
100-00-5

4-chlorobenzonitrile

Conditions
ConditionsYield
With sulfuric acid; ethyl acetate; sodium nitrite In water at 50 - 55℃; for 0.5h;87%
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

acetyl chloride
75-36-5

acetyl chloride

N-(2-chloro-5-nitrophenyl)acetamide
4031-81-6

N-(2-chloro-5-nitrophenyl)acetamide

Conditions
ConditionsYield
With triethylamine In toluene at 20℃;86%
Benzyloxyacetyl chloride
19810-31-2

Benzyloxyacetyl chloride

H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

2-(benzyloxy)-N-(2-chloro-5-nitrophenyl)acetamide
1227629-04-0

2-(benzyloxy)-N-(2-chloro-5-nitrophenyl)acetamide

Conditions
ConditionsYield
With triethylamine In dichloromethane at 20℃;86%
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

C12H10Cl2N4

C12H10Cl2N4

Conditions
ConditionsYield
With ethanol; sodium hydroxide at 80℃; for 24h; chemoselective reaction;86%
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

5-(1-hydroxy-3-methylbutylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione
146380-12-3

5-(1-hydroxy-3-methylbutylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione

C13H15ClN2O4

C13H15ClN2O4

Conditions
ConditionsYield
In benzene for 4h; Reflux;85%
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

benzaldehyde
100-52-7

benzaldehyde

benzyl-(2-chloro-5-nitrophenyl)amine
906371-85-5

benzyl-(2-chloro-5-nitrophenyl)amine

Conditions
ConditionsYield
With sodium tris(acetoxy)borohydride; trifluoroacetic acid In Isopropyl acetate at 20℃; for 0.166667h;84%
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

Diphenyliodonium-2-carboxylate
1488-42-2

Diphenyliodonium-2-carboxylate

5'-nitro-2'-chloro-2-carboxy-diphenylamine
107210-27-5

5'-nitro-2'-chloro-2-carboxy-diphenylamine

Conditions
ConditionsYield
With copper diacetate In N,N-dimethyl-formamide at 100℃;82%
H2NC6H3(Cl)NO2
6283-25-6

H2NC6H3(Cl)NO2

diphenyliodonium-2-carboxylate (DPIC)

diphenyliodonium-2-carboxylate (DPIC)

5'-nitro-2'-chloro-2-carboxy-diphenylamine
107210-27-5

5'-nitro-2'-chloro-2-carboxy-diphenylamine

Conditions
ConditionsYield
With copper diacetate In N,N-dimethyl-formamide at 90℃;82%

6283-25-6Relevant articles and documents

Heteroleptic 1,4-Diazabutadiene Complexes of Ruthenium: Synthesis, Characterization and Utilization in Catalytic Transfer Hydrogenation

Saha, Rumpa,Mukherjee, Aparajita,Bhattacharya, Samaresh

, p. 4539 - 4548 (2020/11/30)

Reaction of [Ru(trpy)Cl3] with 1,4-diazabutadienes (p-RC6H4N=C(H)-(H)C=NC6H4R-p; R = OCH3, CH3, H and Cl; abbreviated as L-R) in refluxing ethanol in the presence of triethylamine has afforded a family of complexes, isolated as perchlorate salts, of type [Ru(trpy)(L-R)Cl]ClO4 [depicted as complexes 1 (R = OCH3), 2 (R = CH3), 3 (R = H) and 4 (R = Cl)]. Crystal structures of complexes 1, 2 and 4 have been determined, and structure of complex 3 has been optimized by DFT method. The 1,4-diazabutadiene ligand in each complex is bound to ruthenium as a N,N-donor forming five-membered chelate. Complexes 1–4 catalyze transfer hydrogenation of aryl aldehydes to the corresponding alcohols with high (ca. 106) TON. They are also found to catalyze transfer hydrogenation of aryl ketones to corresponding secondary alcohols, but with much less efficiency. Catalytic transfer hydrogenation of nitroarenes to the corresponding amines has also been achieved.

Platinum nanoparticles onto pegylated poly(lactic acid) stereocomplex for highly selective hydrogenation of aromatic nitrocompounds to anilines

Oberhauser, Werner,Evangelisti, Claudio,Tiozzo, Cristina,Bartoli, Mattia,Frediani, Marco,Passaglia, Elisa,Rosi, Luca

, p. 50 - 58 (2017/03/16)

A stereocomplexed poly(lactic acid)-polyethyleneglycol copolymer was synthesized and successfully used as recyclable support for Pt nanoparticles, generated by the metal vapor synthesis technique. The confinement of the Pt nanoparticles were determined by thermal analysis. Hydrogenation reactions of chlorinated aromatic nitro compounds, containing other reducible functional groups, to the corresponding anilines occurred with the latter supported Pt nanoparticles in MeOH under very mild reaction conditions (i.e. 30?°C, p(H2)?=?5.0?bar). The covalently attached polyethyleneglycol polymer significantly increased the catalytic activity of the supported Pt nanoparticles compared to an analogous catalytic system which did not contain polyethyleneglycol but the same sized Pt nanoparticles.

Gold supported on titania for specific monohydrogenation of dinitroaromatics in the liquid phase

Liu, Shuang-Shuang,Liu, Xiang,Yu, Lei,Liu, Yong-Mei,He, He-Yong,Cao, Yong

, p. 4162 - 4169 (2014/09/29)

Liquid-phase selective monohydrogenation of various substituted dinitroaromatics to the corresponding valuable nitroanilines was investigated on gold-based catalysts. Special attention was paid to the effect of Au particle size on this monoreduction reaction. Interestingly, TiO2 supported gold catalysts containing a relatively larger mean Au particle size (>5 nm) showed far superior chemoselectivity for specific mono-hydrogenation of dinitroaromatics, with the highest performance attainable for the catalyst bearing Au particles of ca. 7.5 nm. Results in the intermolecular competitive hydrogenation showed that the intrinsic higher accumulation rates of the desired nitroanilines associated with the catalyst possessing larger Au particles were responsible for the high chemoselectivity observed. the Partner Organisations 2014.

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