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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 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
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).
☒N verify (what is checkY☒N ?)

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

Synthesis

N,N-Dimethylbenzylamine can be synthesized by the Eschweiler–Clarke reaction of benzylamine [1][2]

Reactions

It undergoes directed ortho metalation with butyl lithium:

[C6H5CH2N(CH3)2 + BuLi → 2-LiC6H4CH2N(CH3)2
LiC6H4CH2N(CH3)2 + E+ → 2-EC6H4CH2N(CH3)2

Via these reactions, many derivatives are known with the formula 2-X-C6H4CH2N(CH3)2 (E = SR, PR2, etc.).

The amine is basic and undergoes quaternization with alkyl halides (eg hexyl bromide) to give quaternary ammonium salts:[3]

[C6H5CH2N(CH3)2 + RX → [C6H5CH2N(CH3)2R]+X−

Such salts are useful phase transfer catalysts.

References

  1. ^ Icke, R. N.; Wisegarver, B. B.; Alles, G. A. (1945). "β-Phenylethyldimethylamine". Organic Syntheses. 25: 89. doi:10.15227/orgsyn.025.0089.
  2. ^ 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.
  3. ^ "o-Methylethylbenzyl Alcohol". Org. Synth. 34: 58. 1954. doi:10.15227/orgsyn.034.0058. {{cite journal}}: Cite has empty unknown parameter: |1= (help); Cite uses deprecated parameter |authors= (help)

External links

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