Synthesis and application of novel nucleoside phosphonates and phosphoramidites modified at the base moiety.


The H-phosphonates and phosphoramidites of 2'-deoxyisoguanosine, 2'-deoxyisoinosine, 5-aza-7-deaza-2'-deoxyguanosine, and N1-methyl-2'-deoxyformycin A were prepared. The diphenylcarbamoyl group was chosen for the 2-O-protection of 2'-deoxyisoinosine and 2'-deoxyisoguanosine, and dimethylaminoalkylidene groups were used to block the amino function of the… (More)


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