Biocatalytic Separation of N-7/N-9 Guanine Nucleosides

[摘要]：Vorbruggen coupling of trimethylsilylated 2-N-isobutanoylguanine with peracetylated pentofuranose derivatives generally gives inseparable N-7/N-9 glycosyl mixtures We have shown that the two isomers can be separated biocatalytically by Novozyme-435-mediated selective deacetylation of the 5'-O-acetyl group of peracetylated N-9 guanine nucleosides

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