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Dimethylbenzylamine

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Dimethylbenzylamine
Names
IUPAC name
N,N-dimethyl-1-phenylmethanamine
Other names
N,N-Dimethylbenzenemethanamine, N,N-Dimethylbenzylamine, N-Benzyldimethylamine, Dimethylbenzylamine, Benzyl-N,N-dimethylamine, N-(Phenylmethyl)dimethylamine, BDMA, Sumine 2015, Benzenemethanamine, Dabco B-16, Araldite accelerator 062, N,N-Dimethyl(phenyl)methanamine
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
ECHA InfoCard 100.002.863 Edit this at Wikidata
EC Number
  • 203-149-1
UNII
  • InChI=1S/C9H13N/c1-10(2)8-9-6-4-3-5-7-9/h3-7H,8H2,1-2H3 checkY
    Key: XXBDWLFCJWSEKW-UHFFFAOYSA-N checkY
  • InChI=1/C9H13N/c1-10(2)8-9-6-4-3-5-7-9/h3-7H,8H2,1-2H3
    Key: XXBDWLFCJWSEKW-UHFFFAOYAQ
  • N(C)(Cc1ccccc1)C
Properties
C9H13N
Molar mass 135.210 g·mol−1
Appearance colourless to yellow liquid
Density 0.91 g/cm3 at 20 °C
Melting point −75 °C (−103 °F; 198 K)
Boiling point 180 to 183 °C (356 to 361 °F; 453 to 456 K)
1.2 g/100mL[1] (27 °C)
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 3: Liquids and solids that can be ignited under almost all ambient temperature conditions. Flash point between 23 and 38 °C (73 and 100 °F). E.g. gasolineInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
3
3
0
Flash point 55 °C (131 °F; 328 K)
410 °C (770 °F; 683 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

Dimethylbenzylamine is the organic compound with the formula C6H5CH2N(CH3)2. The molecule contains the benzyl group, C6H5CH2, attached to a dimethylamino functional group. It is used as a catalyst for the formation of polyurethane foams and epoxy resins.

Like some other benzyl compounds, the molecule undergoes directed ortho metalation with butyl lithium. Because of this reaction, many derivatives are known with the formula 2-X-C6H4CH2N(CH3)2 (X = SR, PR2, etc.).

The amine is basic and undergoes quaternization with methyl iodide to give the ammonium salt [C6H5CH2N(CH3)3]+I−.[2] Such salts are useful phase transfer catalysts.

N,N-Dimethylbenzylamine can be synthesized by methylation of benzylamine with formic acid and formaldehyde according to the Eschweiler–Clarke reaction.[3][4][5]

References

  1. ^ "Melting point".
  2. ^ Brasen, W. R.; Hauser, C. R. (1963). "2-Methylbenzyldimethylamine". Organic Syntheses; Collected Volumes, vol. 4, p. 585.
  3. ^ Eschweiler, W. (1905). "Ersatz von an Stickstoff gebundenen Wasserstoffatomen durch die Methylgruppe mit Hülfe von Formaldehyd". Chem. Ber. 38: 880. doi:10.1002/cber.190503801154.
  4. ^ Clarke, H. T.; Gillespie, H. B.; Weisshaus, S. Z. (1933). "The Action of Formaldehyde on Amines and Amino Acids". J. Am. Chem. Soc. 55 (11): 4571. doi:10.1021/ja01338a041.
  5. ^ Icke, R. N.; Wisegarver, B. B.; Alles, G. A. (1945). "β-Phenylethyldimethylamine". Organic Syntheses; Collected Volumes, vol. 3, p. 723.

External links

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