Solid-phase synthesis of oligodeoxynucleotides containing O6-alkylguanine

Abstract
Practical methods for the routine solid-phase synthesis of oligodeoxynucleotides containing O6-alkylguanine are described. It is shown that if the 2-amino group of the alkylated base is protected with a phenylacetyl group, and a mixture of nitrobenzaldoximate ions and ammonia used to remove the protecting groups from the oligomer at the end of the synthesis, there is negligible formation of 2,6-diainino-purine and that after chromatography pure oligomers are obtained.

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