N-Chlorophthalimide

N-Chlorophthalimide Property

Melting point:

188-198 °C (lit.)

Boiling point:

315.1±25.0 °C(Predicted)

Density 

1.56±0.1 g/cm3(Predicted)

storage temp. 

under inert gas (nitrogen or Argon) at 2-8°C

form 

powder to crystal

pka

-3.53±0.20(Predicted)

color 

White to Almost white

InChI

InChI=1S/C8H4ClNO2/c9-10-7(11)5-3-1-2-4-6(5)8(10)12/h1-4H

InChIKey

WDRFYIPWHMGQPN-UHFFFAOYSA-N

SMILES

C1(=O)C2=C(C=CC=C2)C(=O)N1Cl

CAS DataBase Reference

3481-09-2(CAS DataBase Reference)

Safety

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36

RIDADR 

1759

WGK Germany 

1

HazardClass 

8

PackingGroup 

II

HS Code 

29349990

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.

N-Chlorophthalimide Chemical Properties,Usage,Production

Chemical Properties

White to pale yellow powder

Uses

N-Chlorophthalimide may be employed in the synthesis of:

• α-amino acetal
• α-amino nitro compounds
• vicinal diamine
• α,β-unsaturated vicinal haloamino nitro compound

General Description

N-Chlorophthalimide in anhydrous acetic acid serves as a useful oxidizing reagent for use in various direct titrimetric analyses. N-Chlorophthalimide can be synthesized by reacting phthalimide, t-butyl hypochlorite, water and t-butyl alcohol. It participates in the synthesis of 2-amino-3-benzoyl-α-(methylthio)phenylacetamide.

Synthesis

General procedure for the synthesis of N-chlorophthalimide from 3-hydroxy-1H-isoindol-1-one: Anhydrous aluminum trichloride (AlCl3, 1 eq., 10 mmol, 1.36 g) was added to an anhydrous acetonitrile (CH3CN, 100 mL) solution of lead tetraacetate (Pb(OAc)4, 1 eq., 10 mmol, 4.52 g). The mixture was stirred at room temperature for 5 minutes before phthalimide (1 eq., 10 mmol, 1.5 g) was added. The resulting mixture was gently refluxed under nitrogen protection for 20 h and subsequently cooled to room temperature. The solvent was removed by rotary evaporation and the crude product was purified by column chromatography using pure dichloromethane (DCM) as eluent. Yield: 1.32 g, 71% yield.1H NMR (300 MHz, CDCl3): δ 7.94-7.91 (m, 2H), 7.82-7.79 (m, 2H) ppm.

References

[1] Synthesis, 2009, # 16, p. 2797 - 2801
[2] Synlett, 2006, # 2, p. 194 - 200
[3] Catalysis Today, 2018, vol. 308, p. 94 - 101
[4] Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 6, p. 1302
[5] Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 8, p. 163