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   » » Wiki: Nornicotine
Tag Wiki 'Nornicotine'.
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Nornicotine is an found in various plants including , the plant. It is chemically similar to , but does not contain a .

It is a precursor to the carcinogen N-nitrosonornicotine that is produced during the curing and processing of tobacco. Nornicotine can react in human saliva to form N-nitrosonornicotine, a known type 1 carcinogen.


Synthesis
There are several routes for the synthesis of nornicotine. One route is the demethylation of nicotine, which can be accomplished by reaction with .

\mathrm{ \xrightarrowH_2O{Ag_2O} }

Another route is the partial reduction of 3-, which can be accomplished by standard catalytic hydrogenation conditions using palladium as a catalyst or with sodium borohydride.. This reaction gives the product.

\mathrm{ \xrightarrowH_2{Pd/C} }


Pharmacology
Nornicotine possess high affinity for alpha-6 and alpha-7 subunits of nAChRs. It also inhibits DAT in striatum via nAChR and releases dopamine in rats.

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