122-04-3

Basic information

• Product Name: 4-Nitrobenzoyl chloride
• Synonyms: 4-NITROBENZOYL CHLORIDE;4-NITROBENZOIC ACID CHLORIDE;LABOTEST-BB LT00077260;P-NITROBENZOYL CHLORIDE;NITROBENZOYL-4 CHLORIDE;4-nitro-benzoylchlorid;Benzoyl chloride, 4-nitro-;Benzoyl chloride, p-nitro-
• CAS NO: 122-04-3
• Molecular Formula: C₇H₄ClNO₃
• Molecular Weight: 185.56
• EINECS: 204-517-4
• Product Categories: Absolute Configuration Determination (Exciton Chirality CD Method);Amino Group Labeling Reagents for HPLC;Analytical Chemistry;Enantiomer Excess & Absolute Configuration Determination;Exciton Chirality CD Method (for Hydroxyl Groups);HPLC Labeling Reagents;Hydroxyl Group Labeling Reagents for HPLC;UV Detection (HPLC Labeling Reagents);Acid Halides;Carbonyl Compounds;Organic Building Blocks;Derivatization Reagents;Derivatization Reagents HPLC;UV-VIS
• Mol File: 122-04-3.mol
• Article Data: 136

Chemical Properties

• Melting Point: 71-74 °C(lit.)
• Boiling Point: 202-205 °C105 mm Hg(lit.)
• Flash Point: 102 °C
• Appearance: Yellow/Flakes or Crystals
• Density: 1.53
• Vapor Pressure: 0.00442mmHg at 25°C
• Refractive Index: 1.5890 (estimate)
• Storage Temp.: Store below +30°C.
• Solubility: Soluble in terahydrofuran, dichloromethane, chloroform and pyrid
• Water Solubility: Decomposes
• Sensitive: Moisture Sensitive
• Stability: Stability Stable, but moisture sensitive. Combustible. Incompatible with water, alcohols, strong oxidizing agents, strong bases.
• Merck: 14,6589
• BRN: 473192
• CAS DataBase Reference: 4-Nitrobenzoyl chloride(CAS DataBase Reference)
• NIST Chemistry Reference: 4-Nitrobenzoyl chloride(122-04-3)
• EPA Substance Registry System: 4-Nitrobenzoyl chloride(122-04-3)

Safety Data

• Hazard Codes: C
• Statements: 34
• Safety Statements: 26-36/37/39-45
• RIDADR: UN 3261 8/PG 2
• WGK Germany: 2
• RTECS: DM6651000
• F: 9-19-21
• TSCA: Yes
• HazardClass: 8
• PackingGroup: II
• Hazardous Substances Data: 122-04-3(Hazardous Substances Data)

Usage

Chemical Properties

yellow needles or powder

Uses

Different sources of media describe the Uses of 122-04-3 differently. You can refer to the following data:
1. 4-Nitrobenzoyl Chloride is used inorganic syntheses such as Michael additions. Also used in the synthesis of polysubstituted furanonaphthoquinoines.
2. 4-Nitrobenzoyl chloride is used in the preparation of polysubstituted furanonaphthoquinoines. It is also involved in Michael addition, Henry reaction, O-alkylation and cycloaddition reactions. Further, it is employed as an intermediate in active pharmaceutical ingredient and dyes.

General Description

Yellow needles or powder with a pungent odor.

Air & Water Reactions

Unstable in moist surroundings and should be kept in a tightly-closed container. React with water or steam .

Reactivity Profile

4-Nitrobenzoyl chloride is incompatible with bases (including amines), with strong oxidizing agents, and with alcohols. May react with reducing agents. May react vigorously or explosively if mixed with diisopropyl ether or other ethers in the presence of trace amounts of metal salts [J. Haz. Mat., 1981, 4, 291].

Health Hazard

TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.

Fire Hazard

Flash point data are not available for 4-Nitrobenzoyl chloride, but 4-Nitrobenzoyl chloride is combustible.

Safety Profile

Moderately toxic by ingestion. Experimental reproductive effects. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx and Cl-. See also NITRO COhlPOUNDS OF AROMATIC HYDROCARBONS and CHLORIDES.

Purification Methods

Crystallise the acid chloride from dry pet ether (b 60-80o), *C6H6 or CCl4. Distil it under vacuum. Irritant. [Adama & Jenkins Org Synth Coll Vol I 394 1941, Beilstein 9 III 1709, 9 IV 1191.]

InChI:InChI=1/C7H4ClNO3/c8-7(10)5-1-3-6(4-2-5)9(11)12/h1-4H

Synthetic route

(4-nitrophenyl)ethanone (100-19-6) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
Stage #1: (4-nitrophenyl)ethanone With pyridine; disulfur dichloride In chlorobenzene at 20℃; for 2.5h; Stage #2: With sulfuryl dichloride In chlorobenzene at 20 - 132℃; for 21h; Reagent/catalyst; Temperature;	90%
Stage #1: (4-nitrophenyl)ethanone With pyridine; sulfur monochloride In chlorobenzene at 20℃; Stage #2: With thionyl chloride In chlorobenzene at 20 - 132℃;	71%
With pyridine; disulfur dichloride at 70 - 138℃; for 21.5h;	83 %Spectr.

4-nitro-benzoic acid (62-23-7) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With thionyl chloride In ethyl acetate for 2h; Heating;	100%
With thionyl chloride for 1h; Reflux;	100%
With thionyl chloride; N,N-dimethyl-formamide for 5h; Reflux;	100%

bis(trichloromethyl) carbonate (32315-10-9) + 4-nitro-benzoic acid (62-23-7) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With pyridine; triethylamine In toluene at 0 - 20℃; for 20h;	90%

5-fluorouracil (51-21-8) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
	52.9%

potassium 4-nitrobenzoate (15922-01-7) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With thionyl chloride; N,N-dimethyl-formamide at 70 - 75℃; for 0.5h;	98.5%

oxalyl dichloride (79-37-8) + RT + 4-nitro-benzoic acid (62-23-7) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
In dichloromethane; N,N-dimethyl-formamide; benzene

4-nitrobenzaldehdye (555-16-8) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With iron(III) chloride; Benzotrichlorid In benzene at 60℃; Rate constant; Mechanism; Thermodynamic data; various concentration ratios;
With trichloroisocyanuric acid In dichloromethane at 20℃; for 120h; Inert atmosphere;
With trichloroisocyanuric acid In dichloromethane at 20℃; for 4h; Inert atmosphere; Irradiation;
With N-chloro-succinimide; thio-xanthene-9-one In acetonitrile at 20℃; for 7h; Irradiation;

N-amino-(4-nitrophenyl)carboxamide (636-97-5) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With hydrogenchloride; Nitroethane; chlorine

oxalyl dichloride (79-37-8) + sodium-4-nitro benzoate → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With benzene

4-nitrobenzyl chloride (619-73-8) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With trichloroisocyanuric acid In dichloromethane at 20℃; for 120h; Inert atmosphere;

tert-butyl 4-nitrobenzoate (19756-72-0) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With thionyl chloride; water In toluene at 100℃; for 16h; Sealed tube;

p-nitrobenzene iodide (636-98-6) + aroyl chloride → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With tris-(dibenzylideneacetone)dipalladium(0); 4,5-bis(diphenylphos4,5-bis(diphenylphosphino)-9,9-dimethylxanthenephino)-9,9-dimethylxanthene In toluene at 100℃; for 12h;

tert-butyl 4-nitrobenzoate (19756-72-0) → 4-nitro-benzoyl chloride (122-04-3) + tert-butyl alcohol (75-65-0)

Conditions	Yield
With sodium hydroxide at 25℃; Rate constant; Equilibrium constant;

trans-5-methyl-2-cyclohexen-p-nitrobenzoate (52393-62-1, 92248-91-4, 99659-46-8) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With water

(p-nitrophenyl)chlorocarbene (102146-13-4) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With oxygen In 1,1,2-Trichloro-1,2,2-trifluoroethane at 20℃; Kinetics; Further Variations:; Temperatures;

pyridine (110-86-1) + 4-nitro-benzoic acid (62-23-7) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With thionyl chloride; diethyl ether

benzoyl chloride (98-88-4) → 4-nitro-benzoyl chloride (122-04-3) + m-nitrobenzoic acid chloride (121-90-4)

Conditions	Yield
With tetrachloromethane; phosphorus pentaoxide; dinitrogen pentoxide

Dichloromethyl methyl ether (4885-02-3) + 4-nitro-benzoic acid (62-23-7) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With zinc(II) chloride

oxalyl dichloride (79-37-8) + 4-nitro-benzoic acid (62-23-7) → 4-nitro-benzoyl chloride (122-04-3)

oxalyl dichloride (79-37-8) + 4-nitro-benzoic acid (62-23-7) → 4-nitro-benzoyl chloride (122-04-3) + <4-nitro-benzoic acid >-anhydride + oxalic acid bis-<4-nitro-benzoic acid >-anhydride

3-chloro-3-(p-nitrophenyl)diazirine (39184-67-3) → 4-nitrobenzaldehdye (555-16-8) + 4-nitrobenzyl chloride (100-14-1) + 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With oxygen In 2,2,4-trimethylpentane Product distribution; Mechanism; Ambient temperature; Irradiation;

1-methyl-4-nitrobenzene (99-99-0) + P2O5 → 4-chloro-benzoyl chloride (122-01-0) + 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
at 180℃; Einleiten von Chlor;

1-methyl-4-nitrobenzene (99-99-0) + phosphorus pentachloride (10026-13-8, 874483-75-7) → 4-chloro-benzoyl chloride (122-01-0) + 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
at 180℃; Einleiten von Chlor;

tetrachloromethane (56-23-5) + benzoyl chloride (98-88-4) + nitrogen pentoxide + phosphorus pentoxide → 4-nitro-benzoyl chloride (122-04-3) + m-nitrobenzoic acid chloride (121-90-4)

Conditions	Yield
at -10℃;

4-nitro-benzoic acid (62-23-7) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With thionyl chloride In ethyl acetate for 2h; Heating;	100%
With thionyl chloride for 1h; Reflux;	100%
With thionyl chloride; N,N-dimethyl-formamide for 5h; Reflux;	100%

potassium 4-nitrobenzoate (15922-01-7) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With thionyl chloride; N,N-dimethyl-formamide at 70 - 75℃; for 0.5h;	98.5%

(4-nitrophenyl)ethanone (100-19-6) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
Stage #1: (4-nitrophenyl)ethanone With pyridine; disulfur dichloride In chlorobenzene at 20℃; for 2.5h; Stage #2: With sulfuryl dichloride In chlorobenzene at 20 - 132℃; for 21h; Reagent/catalyst; Temperature;	90%
Stage #1: (4-nitrophenyl)ethanone With pyridine; sulfur monochloride In chlorobenzene at 20℃; Stage #2: With thionyl chloride In chlorobenzene at 20 - 132℃;	71%
With pyridine; disulfur dichloride at 70 - 138℃; for 21.5h;	83 %Spectr.

bis(trichloromethyl) carbonate (32315-10-9) + 4-nitro-benzoic acid (62-23-7) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With pyridine; triethylamine In toluene at 0 - 20℃; for 20h;	90%

5-fluorouracil (51-21-8) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
	52.9%

pyridine (110-86-1) + 4-nitro-benzoic acid (62-23-7) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With thionyl chloride; diethyl ether

benzoyl chloride (98-88-4) → 4-nitro-benzoyl chloride (122-04-3) + m-nitrobenzoic acid chloride (121-90-4)

Conditions	Yield
With tetrachloromethane; phosphorus pentaoxide; dinitrogen pentoxide

N-amino-(4-nitrophenyl)carboxamide (636-97-5) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With hydrogenchloride; Nitroethane; chlorine

oxalyl dichloride (79-37-8) + 4-nitro-benzoic acid (62-23-7) → 4-nitro-benzoyl chloride (122-04-3)

Dichloromethyl methyl ether (4885-02-3) + 4-nitro-benzoic acid (62-23-7) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With zinc(II) chloride

tert-butyl 4-nitrobenzoate (19756-72-0) → 4-nitro-benzoyl chloride (122-04-3) + tert-butyl alcohol (75-65-0)

Conditions	Yield
With sodium hydroxide at 25℃; Rate constant; Equilibrium constant;

trans-5-methyl-2-cyclohexen-p-nitrobenzoate (52393-62-1, 92248-91-4, 99659-46-8) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With water

4-nitrobenzaldehdye (555-16-8) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With iron(III) chloride; Benzotrichlorid In benzene at 60℃; Rate constant; Mechanism; Thermodynamic data; various concentration ratios;
With trichloroisocyanuric acid In dichloromethane at 20℃; for 120h; Inert atmosphere;
With trichloroisocyanuric acid In dichloromethane at 20℃; for 4h; Inert atmosphere; Irradiation;
With N-chloro-succinimide; thio-xanthene-9-one In acetonitrile at 20℃; for 7h; Irradiation;

3-chloro-3-(p-nitrophenyl)diazirine (39184-67-3) → 4-nitrobenzaldehdye (555-16-8) + 4-nitrobenzyl chloride (100-14-1) + 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With oxygen In 2,2,4-trimethylpentane Product distribution; Mechanism; Ambient temperature; Irradiation;

oxalyl dichloride (79-37-8) + sodium-4-nitro benzoate → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With benzene

tetrachloromethane (56-23-5) + benzoyl chloride (98-88-4) + nitrogen pentoxide + phosphorus pentoxide → 4-nitro-benzoyl chloride (122-04-3) + m-nitrobenzoic acid chloride (121-90-4)

Conditions	Yield
at -10℃;

oxalyl dichloride (79-37-8) + 4-nitro-benzoic acid (62-23-7) → 4-nitro-benzoyl chloride (122-04-3) + <4-nitro-benzoic acid >-anhydride + oxalic acid bis-<4-nitro-benzoic acid >-anhydride

1-methyl-4-nitrobenzene (99-99-0) + phosphorus pentachloride (10026-13-8, 874483-75-7) → 4-chloro-benzoyl chloride (122-01-0) + 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
at 180℃; Einleiten von Chlor;

1-methyl-4-nitrobenzene (99-99-0) + P2O5 → 4-chloro-benzoyl chloride (122-01-0) + 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
at 180℃; Einleiten von Chlor;

(p-nitrophenyl)chlorocarbene (102146-13-4) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With oxygen In 1,1,2-Trichloro-1,2,2-trifluoroethane at 20℃; Kinetics; Further Variations:; Temperatures;

oxalyl dichloride (79-37-8) + RT + 4-nitro-benzoic acid (62-23-7) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
In dichloromethane; N,N-dimethyl-formamide; benzene

4-nitrobenzyl chloride (619-73-8) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With trichloroisocyanuric acid In dichloromethane at 20℃; for 120h; Inert atmosphere;

tert-butyl 4-nitrobenzoate (19756-72-0) → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With thionyl chloride; water In toluene at 100℃; for 16h; Sealed tube;

p-nitrobenzene iodide (636-98-6) + aroyl chloride → 4-nitro-benzoyl chloride (122-04-3)

Conditions	Yield
With tris-(dibenzylideneacetone)dipalladium(0); 4,5-bis(diphenylphos4,5-bis(diphenylphosphino)-9,9-dimethylxanthenephino)-9,9-dimethylxanthene In toluene at 100℃; for 12h;

isobutylamine (78-81-9) + 4-nitro-benzoyl chloride (122-04-3) → N-isobutyl-4-nitrobenzamide (2585-25-3)

Conditions	Yield
With triethylamine In benzene	100%
With triethylamine In chloroform	78%

4-nitro-benzoyl chloride (122-04-3) + aniline (62-53-3) → 4-nitrobenzanilide (3460-11-5)

Conditions	Yield
With triethylamine In dichloromethane at 20℃; for 2.5h;	100%
With pyridine Reflux;	95%
With pyridine at 20℃; Inert atmosphere; Reflux;	91%

4-nitro-benzoyl chloride (122-04-3) + benzyl alcohol (100-51-6) → benzyl 4-nitrobenzoate (14786-27-7)

Conditions	Yield
With dmap In dichloromethane at 20℃; for 96h; Inert atmosphere;	100%
With dmap In dichloromethane at 20℃; for 24h;	92%
With dmap; triethylamine In dichloromethane at 0 - 20℃; for 1h; Inert atmosphere;	82%

4-nitro-benzoyl chloride (122-04-3) + recorcinol (108-46-3) → 3-(4-nitrobenzoyloxy)phenyl 4-nitrobenzoate (187264-29-5)

Conditions	Yield
With pyridine In tetrahydrofuran at 20℃; for 24h;	100%
With tetralin at 160℃;
With pyridine at 100℃;
With pyridine In toluene Heating;

(-)-kainic acid (487-79-6) + 4-nitro-benzoyl chloride (122-04-3) → [(3S)-2t-carboxy-4c-isopropenyl-1-(4-nitro-benzoyl)-pyrrolidin-3r-yl]-acetic acid (101575-64-8)

Conditions	Yield
With sodium hydroxide In water at 0 - 20℃; for 20h; Inert atmosphere;	100%
With water; sodium carbonate

3-hydroxymethyl-3-methyloxethane (3143-02-0) + 4-nitro-benzoyl chloride (122-04-3) → (3-methyloxetan-3-yl)methyl 4-nitrobenzoate (140635-77-4)

Conditions	Yield
With triethylamine In tetrahydrofuran at 20℃; for 0.333333h;	100%

L-glutamic acid 5-tert-butyl 1-methyl ester hydrochloride (6234-01-1) + 4-nitro-benzoyl chloride (122-04-3) → α-methyl γ-tert-butyl N-(p-nitrobenzoyl)-L-glutamate (95485-03-3)

Conditions	Yield
With triethylamine In dichloromethane for 18h;	100%

tetramethylstannane (594-27-4) + 4-nitro-benzoyl chloride (122-04-3) → (4-nitrophenyl)ethanone (100-19-6)

Conditions	Yield
With bis(η3-allyl-μ-chloropalladium(II)) In N,N,N,N,N,N-hexamethylphosphoric triamide at 20℃; for 0.166667h; Mechanism;	100%
With bis(η3-allyl-μ-chloropalladium(II)) In N,N,N,N,N,N-hexamethylphosphoric triamide at 20℃; for 0.166667h;	100%
With benzoylchlorobis(triphenylphosphine)palladium(II) In chloroform at 65℃; for 24h;	95%
With N,N,N,N,N,N-hexamethylphosphoric triamide; poly-γ-(diphenylphosphino)propylsiloxane palladium(0) at 65℃; for 20h;	83%

4-nitro-benzoyl chloride (122-04-3) + 1-(2-oxazolinyl)indole (140934-56-1) → N-(2-Chloro-ethyl)-N-(indole-1-carbonyl)-4-nitro-benzamide

Conditions	Yield
In benzene for 12h; Heating;	100%

4-nitro-benzoyl chloride (122-04-3) + 2,3,6-tridesoxy-3-(trifluoroacetamido)-L-ribo-hex-1-enitol (73891-06-2) → 2,3,6-tridesoxy-4-O-p-nitrobenzoyl-3-(trifluoroacetamido)-L-ribo-hex-1-enitol (73891-07-3)

Conditions	Yield
In pyridine at 20℃; for 16h;	100%

4-nitro-benzoyl chloride (122-04-3) + methyl 5-O-benzoyl-3-O-benzyl-β-D-ribofuranoside (101024-28-6) → methyl 5-O-benzoyl-3-O-benzyl-2-O-(p-nitrobenzoyl)-β-D-ribofuranoside (101024-29-7)

Conditions	Yield
With pyridine for 18h; Ambient temperature;	100%

4-nitro-benzoyl chloride (122-04-3) + methyl 5-O-benzoyl-2-O-benzyl-β-D-ribofuranoside (101024-26-4) → methyl 5-O-benzoyl-2-O-benzyl-3-O-(p-nitrobenzoyl)-β-D-ribofuranoside (101024-27-5)

Conditions	Yield
With pyridine for 18h; Ambient temperature;	100%

Upstream product

• 110-86-1 pyridine 
• 62-23-7 4-nitro-benzoic acid 
• 56-23-5 tetrachloromethane 
• 98-88-4 benzoyl chloride 
• 79-37-8 oxalyl dichloride 
• 99-99-0 1-methyl-4-nitrobenzene 
• 10026-13-8 phosphorus pentachloride 
• 51-21-8 5-fluorouracil 
• 619-73-8 4-nitrobenzyl chloride 
• 19756-72-0 tert-butyl 4-nitrobenzoate 
• 102146-13-4 (p-nitrophenyl)chlorocarbene 
• 39184-67-3 3-chloro-3-(p-nitrophenyl)diazirine 
• 555-16-8 4-nitrobenzaldehdye 
• 15922-01-7 potassium 4-nitrobenzoate 

Downstream Products

• 19614-29-0 1-(p-nitrobenzoyl)aziridine 
• 20857-92-5 N-(p-nitrobenzoyl)azacyclohexane 
• 20461-79-4 α-diazo-p-nitropropiophenone 
• 93065-62-4 1,4-bis(4-nitrobenzoyl)piperazine 
• 4696-98-4 (+/-)-4-nitro-benzoic acid tetrahydrofurfuryl ester 
• 55121-99-8 (4-aminophenyl)(4-methylpiperazin-1-yl)methanone 
• 100193-06-4 4-nitro-benzoic acid tetrahydrothiopyran-4-yl ester 
• 30726-96-6 4-nitro-benzoic acid-(2-pyrrolidino-ethyl ester) 
• 30727-33-4 1-methyl-3-(4-nitro-benzoyloxy)-piperidine 
• 53589-02-9 1-methyl-4-(4-nitro-benzoyloxy)-piperidine 
• 34715-92-9 (4-nitro-phenyl)-thiophen-2-yl-methanone 
• 101575-56-8 4-isopropyl-3-(4-nitro-benzoyloxy)-pyrrole-2-carboxylic acid ethyl ester 
• 314754-67-1 4‐formyl‐2‐methoxyphenyl 4‐nitrobenzoate 
• 16166-61-3 tert-butyl 4-nitrobenzoperoxoate 

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