To increase biological activities we were interested to synthesize benzoylated glucopyranoside with
trityl moiety.
Corvine's key products are sodium azide,
trityl chloride, and ciprofloxacin.
In RPC, the DMT (dimethoxy
trityl) protecting group not on]y functions to prevent the oligonucleotide from undergoing side reactions during synthesis, but it also gives it the necessary hydrophobic characteristic to bind with the reversed phase media.
Molecular beacons were synthesized from oligonucleotides that contained a primary amino group at their 3' end and a sulfhydryl group protected with a
trityl moiety at their 5' end.
To remove the
trityl group selectively in (3) in the presence of eight Boc groups, gradients of C[H.sub.2][Cl.sub.2]/MeOH mixture were eluted through a flash Si[O.sub.2] column packed in hexane containing 1% TFA at the top and hexane containing 1% [Et.sub.3]N on the bottom [27].
However, an injection of free radical (
trityl OX63) is required before the imaging (Figure 5).
With the final
trityl group attached, failure sequences were removed with reversed-phase HPLC on a 4 x 250 mm [C.sub.18] column (Hypersil ODS; Hewlett-Packard) in a 0.1 mol/L triethylammonium acetate mobile phase with a linear gradient with acetonitrile.