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Topic: Aromatic amines protonation problem  (Read 4095 times)

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Offline dielsalder33

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Aromatic amines protonation problem
« on: September 03, 2006, 08:39:45 AM »
Hi,
iwhat do I get if reduce two aromatic nitro-groups under strong HCl (6 M) / SnCl2 condition to get an aromatic amine if I have a Boc proteced secondary amine in the molecule as well. I expect the Boc-protective group to be cleaved.

Let's say, I isolate the product under slightly basic condition (--> neutral molecule). If I reprotonate it (for example excess  2M HCL) do I get a 3+ ion (2x aromatic amine + secondary amine) or is just the former boc-amine group protonated?
Can anybody give me a hint? Thank you very much for answers!

Offline FeLiXe

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Re: Aromatic amines protonation problem
« Reply #1 on: September 03, 2006, 11:32:23 AM »
generally speaking it depends on the base constants of the three amino groups

I think you would have a trication only at very low pHs
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Offline AWK

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Re: Aromatic amines protonation problem
« Reply #2 on: September 04, 2006, 04:24:07 AM »
BOC protecting group is a very labile in acidic conditions
AWK

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