Product Name

  • Name

    Nimesulide

  • EINECS 257-431-4
  • CAS No. 51803-78-2
  • Article Data10
  • CAS DataBase
  • Density 1.451 g/cm3
  • Solubility Soluble in water (<50 µg/ml), 1:10 DMSO:PBS (pH 7.2) (<200 µg/ml), ethanol (1 mg/ml), DMSO (15 mg/ml), DMF (15 mg/ml), chloroform, dichloromethane, acetone (freely soluble), and 1N NaOH.
  • Melting Point 140-146 °C
  • Formula C13H12N2O5S
  • Boiling Point 442 °C at 760 mmHg
  • Molecular Weight 308.315
  • Flash Point 221.1 °C
  • Transport Information UN 2811 6
  • Appearance Yellow Needle-Like Crystals
  • Safety 36-26
  • Risk Codes 22-36/37/38
  • Molecular Structure Molecular Structure of 51803-78-2 (Nimesulide)
  • Hazard Symbols HarmfulXn, IrritantXi
  • Synonyms 4'-Nitro-2'-phenoxymethansulfonanilid;Methanesulfonamide,N-(4-nitro-2-phenoxyphenyl)-;4-Nitro-2-phenoxy-methanesulfonanilide;Aulin;Flogovital;N-(4-Nitro-2-phenoxyphenyl)methanesulfonamide;
  • PSA 109.60000
  • LogP 4.43560

Synthetic route

sodium N-(methylsulfonyl)-N-(4-nitro-2-phenoxyphenyl)sulfamate

sodium N-(methylsulfonyl)-N-(4-nitro-2-phenoxyphenyl)sulfamate

nimesulide
51803-78-2

nimesulide

Conditions
ConditionsYield
With hydrogenchloride In water pH=~ 2;100%
1-amino-2-phenoxy-4-nitrobenzene
5422-92-4

1-amino-2-phenoxy-4-nitrobenzene

methanesulfonyl chloride
124-63-0

methanesulfonyl chloride

nimesulide
51803-78-2

nimesulide

Conditions
ConditionsYield
Stage #1: 1-amino-2-phenoxy-4-nitrobenzene; methanesulfonyl chloride With triethylamine In dichloromethane at 20℃; for 23h; Cooling with ice;
Stage #2: With sodium hydroxide In water for 16h; Reflux;
74.3%
nimesulide radical anion

nimesulide radical anion

A

nimesulide
51803-78-2

nimesulide

B

4-nitrosonimesulide

4-nitrosonimesulide

Conditions
ConditionsYield
In N,N-dimethyl-formamide at 25℃; pH=9.0; Kinetics; Disproportionation;
N-(2-Phenoxyphenyl)-methansulfonamid
51765-51-6

N-(2-Phenoxyphenyl)-methansulfonamid

nimesulide
51803-78-2

nimesulide

Conditions
ConditionsYield
With sulfuric acid; nitric acid; acetic acid for 1h; Activation energy; Temperature;
2-Amino-5-nitrophenol
121-88-0

2-Amino-5-nitrophenol

nimesulide
51803-78-2

nimesulide

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1.1: acetic acid / Reflux
2.1: copper diacetate; pyridine N-oxide; pyridine; oxygen / dichloromethane / 72 h / 20 °C / Molecular sieve
3.1: hydrazine hydrate / methanol / 6 h / Reflux
4.1: triethylamine / dichloromethane / 23 h / 20 °C / Cooling with ice
4.2: 16 h / Reflux
View Scheme
2-(2-hydroxy-4-nitrophenyl)isoindoline-1,3-dione
117346-07-3

2-(2-hydroxy-4-nitrophenyl)isoindoline-1,3-dione

nimesulide
51803-78-2

nimesulide

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: copper diacetate; pyridine N-oxide; pyridine; oxygen / dichloromethane / 72 h / 20 °C / Molecular sieve
2.1: hydrazine hydrate / methanol / 6 h / Reflux
3.1: triethylamine / dichloromethane / 23 h / 20 °C / Cooling with ice
3.2: 16 h / Reflux
View Scheme
2-(4-nitro-2-phenoxyphenyl)isoindoline-1,3-dione

2-(4-nitro-2-phenoxyphenyl)isoindoline-1,3-dione

nimesulide
51803-78-2

nimesulide

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: hydrazine hydrate / methanol / 6 h / Reflux
2.1: triethylamine / dichloromethane / 23 h / 20 °C / Cooling with ice
2.2: 16 h / Reflux
View Scheme
nimesulide
51803-78-2

nimesulide

N-(4-amino-2-phenoxy phenyl) methanesulfonamide
51765-60-7

N-(4-amino-2-phenoxy phenyl) methanesulfonamide

Conditions
ConditionsYield
With 5% Pd(II)/C(eggshell); hydrogen In ethyl acetate at 27℃; for 3h;100%
With hydrogenchloride; tin In water at 90℃; for 3h;100%
With hydrogen; palladium on activated charcoal In ethanol Ambient temperature;97%
nimesulide
51803-78-2

nimesulide

methyl iodide
74-88-4

methyl iodide

N-Methyl-N-(4-nitro-2-phenoxy-phenyl)-methanesulfonamide
51765-67-4

N-Methyl-N-(4-nitro-2-phenoxy-phenyl)-methanesulfonamide

Conditions
ConditionsYield
Stage #1: nimesulide With sodium hydride In N,N-dimethyl-formamide; mineral oil at 0℃; for 0.5h; Inert atmosphere;
Stage #2: methyl iodide In N,N-dimethyl-formamide at 0 - 20℃; for 12h; Inert atmosphere;
99%
With potassium carbonate In acetonitrile for 5h;77%
nimesulide
51803-78-2

nimesulide

C13H10(2)H2N2O5S

C13H10(2)H2N2O5S

Conditions
ConditionsYield
With [(1,5-cyclooctadiene)Ir(1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene)(PPh3)]PF6; deuterium In dichloromethane at 20℃; for 2h; Sealed tube;96%
tetrafluoroboric acid diethyl ether
67969-82-8

tetrafluoroboric acid diethyl ether

nimesulide
51803-78-2

nimesulide

2,3,7,8-tetrafluorothianthrene-S-oxide

2,3,7,8-tetrafluorothianthrene-S-oxide

C25H15F4N2O5S3(1+)*BF4(1-)

C25H15F4N2O5S3(1+)*BF4(1-)

Conditions
ConditionsYield
With 2,3,7,8-tetrafluorothianthrene; trifluoroacetic anhydride In acetonitrile at 0 - 25℃; regioselective reaction;93%
tetrafluoroboric acid diethyl ether
67969-82-8

tetrafluoroboric acid diethyl ether

sodium tetrafluoroborate
13755-29-8

sodium tetrafluoroborate

nimesulide
51803-78-2

nimesulide

2,3,7,8-tetrafluorothianthrene-S-oxide

2,3,7,8-tetrafluorothianthrene-S-oxide

C25H15F4N2O5S3(1+)*BF4(1-)

C25H15F4N2O5S3(1+)*BF4(1-)

Conditions
ConditionsYield
Stage #1: tetrafluoroboric acid diethyl ether; nimesulide; 2,3,7,8-tetrafluorothianthrene-S-oxide With trifluoroacetic anhydride In acetonitrile at 0 - 25℃; for 3h; Sealed tube;
Stage #2: sodium tetrafluoroborate In dichloromethane; water
93%
nimesulide
51803-78-2

nimesulide

silver nitrate

silver nitrate

Conditions
ConditionsYield
With KOH In water ligand, AgNO3, and KOH (1:1.1:1.1 molar ratio), stirred at room temp. for 1 h; ppt. filtered off, washed (water), dried (P2O5), elem. anal.;89%
nimesulide
51803-78-2

nimesulide

benzyl bromide
100-39-0

benzyl bromide

N-benzyl-N-(4-nitro-2-phenoxyphenyl)methanesulfonamide

N-benzyl-N-(4-nitro-2-phenoxyphenyl)methanesulfonamide

Conditions
ConditionsYield
With potassium carbonate In N,N-dimethyl-formamide at 20℃; for 4h; Inert atmosphere;88%
nimesulide
51803-78-2

nimesulide

propargyl bromide
106-96-7

propargyl bromide

C16H14N2O5S
1601552-74-2

C16H14N2O5S

Conditions
ConditionsYield
With potassium carbonate In acetone at 20℃;85%
Stage #1: nimesulide With potassium carbonate In acetone at 20℃; for 0.5h; Inert atmosphere;
Stage #2: propargyl bromide In acetone at 20℃; for 24h; Inert atmosphere;
80.6%
4-Phenyl-1-butene
768-56-9

4-Phenyl-1-butene

nimesulide
51803-78-2

nimesulide

N-(2-phenoxy-4-((1-phenylbutyl)amino)phenyl)methanesulfonamide

N-(2-phenoxy-4-((1-phenylbutyl)amino)phenyl)methanesulfonamide

Conditions
ConditionsYield
With nickel(II) iodide; 6,6'-dimethyl-2,2'-bipyridine; (dimethoxy)methylsilane In N,N-dimethyl acetamide at 0 - 50℃; for 12.1667h; Inert atmosphere; Sealed tube; regioselective reaction;83%
nimesulide
51803-78-2

nimesulide

4-nitro-2-phenoxymethanesulfonanilide sodium salt

4-nitro-2-phenoxymethanesulfonanilide sodium salt

Conditions
ConditionsYield
With sodium In tetrahydrofuran for 4h; Heating;79%
With sodium hydroxide In water at 45℃; for 1h; Temperature;
methanol
67-56-1

methanol

nimesulide
51803-78-2

nimesulide

N-(4-(dimethylamino)-2-phenoxyphenyl)methanesulfonamide

N-(4-(dimethylamino)-2-phenoxyphenyl)methanesulfonamide

Conditions
ConditionsYield
With aluminum (III) chloride; water In acetonitrile at 20℃; Irradiation;78%
With palladium 10% on activated carbon; potassium tert-butylate at 150℃; for 60h;
formaldehyd
50-00-0

formaldehyd

nimesulide
51803-78-2

nimesulide

N-(4-(methylamino)-2-phenoxyphenyl)methanesulfonamide

N-(4-(methylamino)-2-phenoxyphenyl)methanesulfonamide

Conditions
ConditionsYield
With hydrogen In 1,4-dioxane at 60℃; under 7500.75 Torr; for 24h; Autoclave;77%
nimesulide
51803-78-2

nimesulide

N-methyl-O-((4-nitrophenyl)sulfonyl)hydroxylammonium trifluoromethanesulfonate

N-methyl-O-((4-nitrophenyl)sulfonyl)hydroxylammonium trifluoromethanesulfonate

A

N-(2-(4-(methylamino)phenoxy)-4-nitrophenyl)methanesulfonamide

N-(2-(4-(methylamino)phenoxy)-4-nitrophenyl)methanesulfonamide

B

N-(2-(2-(methylamino)phenoxy)-4-nitrophenyl)methanesulfonamide

N-(2-(2-(methylamino)phenoxy)-4-nitrophenyl)methanesulfonamide

Conditions
ConditionsYield
With ferrous(II) sulfate heptahydrate at 40℃; for 16h; regioselective reaction;A 64%
B 10%
nimesulide
51803-78-2

nimesulide

p-toluenesulfonyl chloride
98-59-9

p-toluenesulfonyl chloride

4-methyl-N-(methylsulfonyl)-N-(4-nitro-2-phenoxyphenyl)benzenesulfonamide

4-methyl-N-(methylsulfonyl)-N-(4-nitro-2-phenoxyphenyl)benzenesulfonamide

Conditions
ConditionsYield
With sodium carbonate In water at 35℃; pH=8 - 10;56%
2-chloromethyl-1H-benzimidazole
4857-04-9

2-chloromethyl-1H-benzimidazole

nimesulide
51803-78-2

nimesulide

N-((1H-benzo[d]imidazol-2-yl)methyl)-N-(4-nitro-2-phenoxyphenyl)methanesulfonamide

N-((1H-benzo[d]imidazol-2-yl)methyl)-N-(4-nitro-2-phenoxyphenyl)methanesulfonamide

Conditions
ConditionsYield
Stage #1: nimesulide With potassium carbonate In N,N-dimethyl-formamide at 20℃; for 0.25h; Inert atmosphere;
Stage #2: 2-chloromethyl-1H-benzimidazole In N,N-dimethyl-formamide at 25 - 60℃;
56%
2-nitrochalcone
53744-31-3, 7473-93-0

2-nitrochalcone

nimesulide
51803-78-2

nimesulide

C28H23N3O4S

C28H23N3O4S

Conditions
ConditionsYield
With diethyl 2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate; potassium carbonate In ethanol at 90℃; for 1h; Schlenk technique; Inert atmosphere;54%
nimesulide
51803-78-2

nimesulide

fenofibrate boronic acid

fenofibrate boronic acid

isopropyl 2-methyl-2-(4-(4-(N-(4-(methylsulfonamido)-3-phenoxyphenyl)sulfamoyl)benzoyl)phenoxy)propanoate

isopropyl 2-methyl-2-(4-(4-(N-(4-(methylsulfonamido)-3-phenoxyphenyl)sulfamoyl)benzoyl)phenoxy)propanoate

Conditions
ConditionsYield
With sodium metabisulfite; lithium phosphate; choline chloride In N,N-dimethyl-formamide at 130℃; for 10h; Inert atmosphere;50%
With sodium metabisulfite; lithium phosphate; choline chloride; water In N,N-dimethyl-formamide at 130℃; for 10h; Schlenk technique; Inert atmosphere;50%
nimesulide
51803-78-2

nimesulide

C13H10(3)H2N2O5S

C13H10(3)H2N2O5S

Conditions
ConditionsYield
With tritium; [(1,5-cyclooctadiene)Ir(1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene)(PPh3)]PF6 In Isopropyl acetate at 20℃; for 4h;12%
nimesulide
51803-78-2

nimesulide

A

N-(4-amino-2-phenoxy phenyl) methanesulfonamide
51765-60-7

N-(4-amino-2-phenoxy phenyl) methanesulfonamide

B

4-Hydroxy-Nimesulide
109032-22-6

4-Hydroxy-Nimesulide

Conditions
ConditionsYield
With sodium tetrahydroborate; oxygen; Cl8-5,10,15,20-tetraphenylporphyrinatoiron(III) chloride at 25℃; for 2h;A 11 % Chromat.
B 4.5 % Chromat.
nimesulide
51803-78-2

nimesulide

A

N-(4-amino-2-phenoxy phenyl) methanesulfonamide
51765-60-7

N-(4-amino-2-phenoxy phenyl) methanesulfonamide

B

4-nitrosonimesulide

4-nitrosonimesulide

C

4-hydroxylamine nimesulide
503552-34-9

4-hydroxylamine nimesulide

Conditions
ConditionsYield
With sodium tetrahydroborate; meso-tetraphenylporphyrin iron(III) chloride In methanol; dichloromethane at 20℃; for 1h; Product distribution; Further Variations:; Catalysts;
nimesulide
51803-78-2

nimesulide

4-hydroxylamine nimesulide
503552-34-9

4-hydroxylamine nimesulide

Conditions
ConditionsYield
With ammonium chloride; zinc
nimesulide
51803-78-2

nimesulide

4-nitrosonimesulide

4-nitrosonimesulide

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: Zn; NH4Cl
2: potassium dichromate / 0 °C
View Scheme
nimesulide
51803-78-2

nimesulide

N-(4-Cyano-2-phenoxy-phenyl)-methanesulfonamide

N-(4-Cyano-2-phenoxy-phenyl)-methanesulfonamide

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 97 percent / H2 / 10percent Pd/C / ethanol / Ambient temperature
2: 1.) NaNO2, aq. HCl, 2.) NaCN / 1.) 5 deg C, 2.) H2O, benzene, from 0 to 40 deg C, 1.5 h
View Scheme
nimesulide
51803-78-2

nimesulide

N-[2-Phenoxy-4-(1H-tetrazol-5-yl)-phenyl]-methanesulfonamide

N-[2-Phenoxy-4-(1H-tetrazol-5-yl)-phenyl]-methanesulfonamide

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 97 percent / H2 / 10percent Pd/C / ethanol / Ambient temperature
2: 1.) NaNO2, aq. HCl, 2.) NaCN / 1.) 5 deg C, 2.) H2O, benzene, from 0 to 40 deg C, 1.5 h
3: 1.) Me3SnN3, 2.) silica gel / 1.) toluene, reflux, 24 h, 2.) MeOH, RT, 4 h
View Scheme

Nimesulide Chemical Properties


IUPAC Name: N-(4-Nitro-2-phenoxyphenyl)methanesulfonamide
Molecular Formula: C13H12N2O5
Molecular Weight: 308.31 g/mol
Canonical SMILES: c1(c(ccc(c1)[N+](=O)[O-])NS(C)(=O)=O)Oc1ccccc1
InChI: InChI=1/C13H12N2O5S/c1-21(18,19)14-12-8-7-10(15(16)17)9-13(12)20-11-5-3-2-4-6-11/h2-9,14H,1H3
EINECS: 257-431-4
Classification Code: Analgesics; Analgesics, Non-Narcotic; Anti-Inflammatory Agents; Anti-inflammatory agents, non-steroidal; Antirheumatic Agents; Cyclooxygenase inhibitors; Drug / Therapeutic Agent; Enzyme Inhibitors; Human Data; Peripheral Nervous System Agents; Sensory System Agents
Product Categories: Active Pharmaceutical Ingredients; All Inhibitors;Inhibitors; Intermediates & Fine Chemicals; Pharmaceuticals
Stability: Stable. Incompatible with strong oxidizing agents.
Index of Refraction: 1.638 
Molar Refractivity: 76.32 cm3 
Molar Volume: 212.3 cm3 
Polarizability: 30.25×10-24 cm
Surface Tension: 62 dyne/cm 
Density:  1.451 g/cm3 
Flash Point: 221.1 °C 
Enthalpy of Vaporization: 69.94 kJ/mol 
Boiling Point: 442 °C at 760 mmHg 
Melting Point: 140-146 °C
Storage temperature: 2-8 °C
Vapour Pressure of Nimesulide (CAS NO.51803-78-2): 5.19E-08 mmHg at 25 °C

Nimesulide History

  Nimesulide (CAS NO.51803-78-2) was launched in Italy for the first time as Aulin and Mesulid in 1985. It has become a leading non-steroidal anti-inflammatory drug in over 50 countries worldwide. In 2002 nimesulide benefit/risk profile was reviewed by the EMEA following decision to temporarily suspend the drug from the market in March 2002.
Due to concerns about the risk of hepatotoxicity, nimesulide has been withdrawn from market in many countries.

Nimesulide Uses

  Nimesulide (CAS NO.51803-78-2) is a relatively COX-2 selective, non-steroidal anti-inflammatory drug (NSAID) with analgesic and antipyretic properties. Its approved indications are the treatment of acute pain, the symptomatic treatment of osteoarthritis and primary dysmenorrhoea in adolescents and adults above 12 years old.

Nimesulide Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
man TDLo oral 100mg/kg/5W-I (100mg/kg) LIVER: "HEPATITIS (HEPATOCELLULAR NECROSIS), ZONAL"

LIVER: "JAUNDICE, CHOLESTATIC"

SKIN AND APPENDAGES (SKIN): "DERMATITIS, OTHER: AFTER SYSTEMIC EXPOSURE"
Journal of Hepathology. Vol. 29, Pg. 135, 1998.
mouse LD50 intraperitoneal 216mg/kg (216mg/kg)   Gekkan Yakuji. Pharmaceuticals Monthly. Vol. 17, Pg. 1254, 1975.
mouse LD50 oral 392mg/kg (392mg/kg)   Gekkan Yakuji. Pharmaceuticals Monthly. Vol. 17, Pg. 1254, 1975.
rat LD50 intraperitoneal 163mg/kg (163mg/kg)   Gekkan Yakuji. Pharmaceuticals Monthly. Vol. 17, Pg. 1254, 1975.
rat LD50 oral 200mg/kg (200mg/kg)   Federation Proceedings, Federation of American Societies for Experimental Biology. Vol. 34, Pg. 759, 1975.
women TDLo oral 2mg/kg (2mg/kg) KIDNEY, URETER, AND BLADDER: "CHANGES IN TUBULES (INCLUDING ACUTE RENAL FAILURE, ACUTE TUBULAR NECROSIS)"

KIDNEY, URETER, AND BLADDER: PROTEINURIS
Nephrology, Dialysis, Transplantation. Vol. 12, Pg. 1493, 1997.
women TDLo oral 84mg/kg/3W-I (84mg/kg) LIVER: "HEPATITIS (HEPATOCELLULAR NECROSIS), ZONAL"

BLOOD: EOSINOPHILIA
Journal of Hepathology. Vol. 29, Pg. 135, 1998.
women TDLo unreported 8mg/kg (8mg/kg) SENSE ORGANS AND SPECIAL SENSES: CHANGE IN FUNCTION: TASTE

SKIN AND APPENDAGES (SKIN): "DERMATITIS, OTHER: AFTER SYSTEMIC EXPOSURE"
Allergy. Vol. 52(Suppl,

Nimesulide Safety Profile

Hazard Codes of Nimesulide (CAS NO.51803-78-2): HarmfulXn,IrritantXi
Risk Statements: 22-36/37/38 
R22: Harmful if swallowed. 
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements: 36-26 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36: Wear suitable protective clothing.
RIDADR: UN 2811 6.1/PG 3
WGK Germany: 3
RTECS of Nimesulide (CAS NO.51803-78-2): PB0970000

Nimesulide Specification

 Nimesulide (CAS NO.51803-78-2), its Synonyms are 4'-Nitro-2'-phenoxymethansulfonanilid ; 4-Nitro-2-phenoxy-methanesulfonanilide ; Aulin ; Flogovital ; Mesulid ; N-(4-Nitro-2-phenoxyphenyl)methanesulfonamide ; Nimed ; Nimesulida ; Methanesulfonamide, N-(4-nitro-2-phenoxyphenyl)- (9CI) ; Methanesulfonanilide, 4'-nitro-2'-phenoxy- . It is yellow needle-like crystals.

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