Basic information Safety Supplier Related

Chloromethyl isobutyrate

Basic information Safety Supplier Related

Chloromethyl isobutyrate Basic information

Product Name:
Chloromethyl isobutyrate
Synonyms:
  • (Isobutyryloxy)methyl chloride
  • Chloromethyl 2-methylpropanoate
  • Chloromethyl 2-methylpropionate
  • Propanoicacid, 2-methyl-, chloromethyl ester
  • Chloromethyl isobutyrate
CAS:
61644-18-6
MF:
C5H9ClO2
MW:
136.58
EINECS:
816-730-5
Mol File:
61644-18-6.mol
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Chloromethyl isobutyrate Chemical Properties

Boiling point:
124.6±13.0 °C(Predicted)
Density 
1.081±0.06 g/cm3(Predicted)
storage temp. 
under inert gas (nitrogen or Argon) at 2-8°C
solubility 
Chloroform (Sparingly), Methanol (Slightly)
form 
Oil
color 
Colourless
InChI
InChI=1S/C5H9ClO2/c1-4(2)5(7)8-3-6/h4H,3H2,1-2H3
InChIKey
ILUWVORABZTBIU-UHFFFAOYSA-N
SMILES
C(OCCl)(=O)C(C)C
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Safety Information

RIDADR 
UN2920
HazardClass 
8, 3
HS Code 
2915907098
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Chloromethyl isobutyrate Usage And Synthesis

Synthesis

49715-04-0

79-31-2

61644-18-6

Step A: Synthesis of chloromethyl isobutyrate To a solution of isobutyric acid (0.600 mL, 6.47 mmol) in dichloromethane (DCM, 6 mL) was added sodium bicarbonate (2092 mg, 24.91 mmol), tetrabutylammonium hydrogensulfate (220 mg, 0.65 mmol), and water (6 mL) in that order. Chloromethyl chloroformate (0.767 mL, 7.44 mmol) was added slowly at room temperature with rapid stirring. After addition, the reaction mixture was continued to stir at room temperature overnight. Upon completion of the reaction, the reaction mixture was diluted with dichloromethane (10 mL) and subsequently washed with water (2 x 10 mL). The organic phase was dried over anhydrous sodium sulfate (Na2SO4), filtered and concentrated to afford the crude chloromethyl isobutyrate (746 mg, 84% yield). The product was used directly in the next step of the reaction without further purification. 1H NMR (500 MHz, CDCl3) δ ppm: 1.17 (m, 6H), 2.62 (m, 1H), 5.72 (s, 2H).

References

[1] Patent: WO2015/67923, 2015, A1. Location in patent: Paragraph 00072; 00073; 00074
[2] Patent: US2018/37550, 2018, A1. Location in patent: Paragraph 0081-0083
[3] Patent: WO2014/4884, 2014, A1. Location in patent: Paragraph 00310-00311; 00322

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