ChemicalBook > CAS DataBase List > 6-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE

6-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE

Product Name
6-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE
CAS No.
81721-87-1
Chemical Name
6-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE
Synonyms
SALOR-INT L168017-1EA;6-nitro-4H-1,4-benzoxazin-3-one;6-Nitro-2H-1,4-Benzoxazine-3-One;6-NITRO-4H-BENZO[1,4]OXAZIN-3-ONE;6-Nitro-2H-1,4-benzoxazin-3(4H)-on;6-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE;2H-1,4-Benzoxazin-3(4H)-one, 6-nitro-;6-Nitro-2H-1,4-benzoxazin-3(4H)-one ,98%;6-nitro-2H-benzo[b][1,4]oxazin-3(4H)-one;6-nitro-3,4-dihydro-2H-1,4-benzoxazin-3-one
CBNumber
CB9674819
Molecular Formula
C8H6N2O4
Formula Weight
194.14
MOL File
81721-87-1.mol
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6-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE Property

Melting point:
236-240 °C
storage temp. 
Inert atmosphere,Room Temperature
form 
powder to crystal
color 
White to Orange to Green
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Safety

Hazard Codes 
Xi
Risk Statements 
36/37/38
Safety Statements 
26-36
WGK Germany 
3
HazardClass 
IRRITANT
HS Code 
2914390090
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
662313
Product name
6-Nitro-2H-1,4-benzoxazin-3(4H)-one
Purity
97%
Packaging
10g
Price
$110.78
Updated
2025/07/31
Sigma-Aldrich
Product number
662313
Product name
6-Nitro-2H-1,4-benzoxazin-3(4H)-one
Purity
97%
Packaging
1g
Price
$33
Updated
2023/06/20
TCI Chemical
Product number
N0999
Product name
6-Nitro-2H-1,4-benzoxazin-3(4H)-one
Purity
>98.0%(GC)
Packaging
1g
Price
$167
Updated
2025/07/31
TRC
Product number
N546555
Product name
6-Nitro-2H-1,4-benzoxazin-3(4H)-one
Packaging
100mg
Price
$60
Updated
2021/12/16
TRC
Product number
N546555
Product name
6-Nitro-2H-1,4-benzoxazin-3(4H)-one
Packaging
500mg
Price
$75
Updated
2021/12/16
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6-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE Chemical Properties,Usage,Production

Synthesis

79-04-9

99-57-0

81721-87-1

The general procedure for the synthesis of 6-nitro-2H-1,4-benzoxazin-3(4H)-one from chloroacetyl chloride and 2-amino-4-nitrophenol was as follows: 1. 2-Amino-4-nitrophenol (6.0 g, 38.93 mmol) was dissolved in dichloromethane (200 mL) and the solution was cooled to 0°C. 2. To the cooled solution, triethylamine (16.3 mL, 116.9 mmol) and chloroacetyl chloride (3.42 mL, 42.8 mmol) were added sequentially with stirring, noting that the chloroacetyl chloride had to be added in small batches to avoid violent reaction. 3. After the addition of chloroacetyl chloride, the reaction mixture was gradually warmed up to room temperature and stirred for 18 hours to ensure complete reaction. 4. After completion of the reaction, the reaction mixture is diluted with additional dichloromethane and the organic phase is subsequently washed with water to remove water soluble impurities. 5. The organic phase was dried over anhydrous magnesium sulfate, filtered to remove the desiccant, and the filtrate was concentrated under reduced pressure to afford 6-nitro-4H-benzo[1,4]oxazin-3-one as 7.5 g solid in 100% yield.

References

[1] Patent: US2010/160373, 2010, A1. Location in patent: Page/Page column 30
[2] Patent: US2007/93477, 2007, A1. Location in patent: Page/Page column 20
[3] Bioorganic and Medicinal Chemistry, 2013, vol. 21, # 13, p. 3821 - 3830
[4] Journal of Medicinal Chemistry, 2015, vol. 58, # 1, p. 222 - 236
[5] Patent: WO2018/19252, 2018, A1. Location in patent: Page/Page column 37

6-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE Preparation Products And Raw materials

Raw materials

N,N-Dimethylformamide Potassium carbonate Chloroform Chloroacetyl chloride 2-Amino-4-nitrophenol Sodium carbonate

Preparation Products

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6-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE Suppliers

Americas 1 China 68 Europe 1 France 1 Germany 1 India 4 Japan 1 Switzerland 1 Ukraine 1 United Kingdom 2 United States 11 Global 92
J & K SCIENTIFIC LTD.
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18210857532; 18210857532
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021-67582001/03/05
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028-85114309 18982182443
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81721-87-1, 6-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONERelated Search:

6-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE 7-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE 2H-1,4-BENZOXAZIN-3(4H)-ONE 2-METHYL-6-NITRO-2H-BENZO[B][1,4]OXAZIN-3(4H)-ONE 2-(2-HYDROXYETHYL)-6-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE 2,2-DIMETHYL-6-NITRO-3,4-DIHYDRO-2H-BENZO[1,4]OXAZINE-ONE ETHYL 2-METHYL-6-NITRO-3-OXO-3,4-DIHYDRO-2H-1,4-BENZOXAZINE-2-CARBOXYLATE (2R)-6-CHLORO-2-METHYL-8-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE 2-METHYL-6-NITRO-3-OXO-3,4-DIHYDRO-2H-1,4-BENZOXAZINE-2-CARBOXYLIC ACID 5-Nitro-2H-1,4-benzoxazin-3(4H)-one 2-(2-[4-(2-FLUOROPHENYL)PIPERAZINO]ETHYL)-7-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE 2-[2-(4-ETHYLPIPERAZINO)ETHYL]-7-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE 2-(2-[4-(2,6-DIMETHYLPHENYL)PIPERAZINO]ETHYL)-7-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE 4-benzyl-6-chloro-7-nitro-2H-1,4-benzoxazin-3(4H)-one (6-NITRO-3-OXO-2,3-DIHYDRO-4H-1,4-BENZOXAZIN-4-YL)ACETIC ACID 4-(2,3-DIHYDRO-6-NITRO-3-OXOBENZO[B][1,4]OXAZIN-4-YL)BUTANOIC ACID 6-NITRO-2-(2-[4-(4-NITROPHENYL)PIPERAZINO]ETHYL)-2H-1,4-BENZOXAZIN-3(4H)-ONE 2-(2-MORPHOLINOETHYL)-6-NITRO-2H-1,4-BENZOXAZIN-3(4H)-ONE

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