Guanamine

In organic chemistry, a guanamine is an organic compound with the formula (H₂NC)₂N₃CR^{[further explanation needed]}. They are heterocycles of the triazine class. Guanamines are closely related to melamine ((H₂NC)₃N₃), except with one amino substituent replaced by an organic group. With two amines, guanamines are bifunctional, whereas melamine is trifunctional. This difference is exploited in the use of guanamines to modify the crosslink density in melamine resins. They are white or colorless solids of low toxicity.^[1]

Some popular guanamines are the phenyl, methyl and nonyl derivatives, called benzoguanamine, acetoguanamine, and capriguanamine. They are all prepared by the condensation of cyanoguanidine with the corresponding nitrile:^[2]

(H₂N)₂C=NCN + RCN → (CNH₂)₂(CR)N₃

References

^ H. Deim; G. Matthias; R. A. Wagner (2012). "Amino Resins". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a02_115.pub2. ISBN 978-3-527-30673-2.
^ J. K. Simons; M. R. Saxton (1953). "Benzoguanamine". Org. Synth. 33: 13. doi:10.15227/orgsyn.033.0013.

[1] H. Deim; G. Matthias; R. A. Wagner (2012). "Amino Resins". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a02_115.pub2. ISBN 978-3-527-30673-2.

[2] J. K. Simons; M. R. Saxton (1953). "Benzoguanamine". Org. Synth. 33: 13. doi:10.15227/orgsyn.033.0013.

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