# Alkyl chain substituent has higher preference than benzyl substituent?

The compound in question, and the name generated by ChemSketch:

I have looked at relevant (outdated) documentation for naming of substituted amines. I understand tertiary amines are named as: $\text{N-alkyl}_1\text{N-alkyl}_2\text{alkyl}_3\text{amine}$.

Now, I am confused at the first point: when we have to select the parent carbon chain. For this compound, I would have selected "benzylamine" as the parent chain, as it obviously has more number of carbon atoms and more unsaturation than both methyl and propyl. Thus, my preferred IUPAC name would have been "N-methyl-N-propylbenzylamine".

But, for some reason "propane" is the main carbon chain here instead. So, what is the logical reasoning for the naming these tertiary amines?

• Notice propane not -yl here? Can you make such change in benzyl? Feb 3 '18 at 16:18
• @Mithoron No, I can't... But still, that small detail shouldn't stop benzyl from being the main chain. There must be another way to name benzyl as the main chain I hope? Feb 3 '18 at 16:22