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Here is one approach described in the scientific literature:
Ethanol production from banana peels using statistically optimized simultaneous saccharification and fermentation process (Oberoi et al, Waste Management Volume 31, Issue 7, July 2011, Pages 1576-1584.)
Of course, the ultimate determination of how to make "Banadine" depends on how you define the stuff. As most people know, banana peels contain lignin, which is generally a complex array of linked aromatic polyphenols.
Here is a sample structure of a variety of lignin:
If one looks carefully, one can note structures which on appropriate types of depolymerization one can derive structures similar to vanillin and, for one example, sytringaldehyde.
Vanillin:
Syringaldehyde:
Demethylation of vanillin followed by formation of a acetal with the two aromatic oxygens using formaldehyde, gives 3,4 methylene dioxiybenzaldehyde, which can be converted in as little two steps to the illegal drug 3,4-methylene dioxyamphetamine, known colloquially as "Ecstasy."
Methylation of sytringaldehyde, followed by condensation with nitromethane and reduction with lithium aluminum hydride gives the illegal drug mescaline.
I do not recommend doing this at home, since there are several potentially dangerous steps which can be deadlly, and in any case, performing this chemistry, even under safe conditions can lead to an unpleasant visit from the DEA.
In any case, there are many simpler routes to these compounds, given the difficulty of isolating the vanillin and syringaldehyde from lignin, the precise nature of the particular variety of lignin in banana peels probably being less explored than sources from, say, wood, or straw.
I hope this explains why it is unlikely that anyone has made "bananadine" from banana peels, even if "bananadine" has been precisely defined.
