Need some advice whether this is even possible. I'm trying to design a biotin that is substituted on one of the N of the ring with a good leaving group. I've seen a bis-N-alkylated (+)-biotin derivative, but I only want one group modified. Then, on the tail, I'd like to have a His, or some functional group containing a His. I then need a good maybe nucleophile to attack aforementioned leaving group so the biotin "head" could be free to then bind to a streptavidin labeled signal. Basically, I need to keep the "head" protected/anchored with the first modification until I introduce the attacking group to then do some kind of substitution reaction to displace it.
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Topic: Biotin modifications and reactions (Read 5198 times)