I understand that the hydrogenation of synephrine sould lead to either N-methylphenethylamine or 4-HO-N-Methylphenethylamine (even though I cannot find the second one).
But what would result if it would be oxidized?
I suppose the hydrogen from the beta position would be removed, leaving a double-bonded oxygen behind. Or alternatively both OH groups will be broken and an oxygen will be left on beta and another on R4... but again, I can't find either of these molecules anywhere, so do they even exist?
Is it impossible to oxidize synephrine? I'm fairly sure it should be doable... what do you think?