Abstract
Abstract A systematic synthesis of some purine 8,5′-imino and substituted imino cyclonucleosides has been introduced. Thus, 2′,3′-O-isopropylidene derivatives of 8-methylaminoadenosine, 8-methylaminoinosine, 8-benzylaminoadenosine and 8-benzylaminoinosine with excess diphenyl carbonate/Et3N in DMF gave the corresponding 8,5′substituted imino cyclonucleosides. These were converted to the debenzylated derivatives or to 8,5′-methylimino cycloadenosine.
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