Method for synthesis

Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system

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544244, 546 23, 548112, 548117, C07F 96512, C07F 96503, C07F 9653, C07F 96539

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active

055918514

ABSTRACT:
The internally cyclized congeners of hydroxy-substituted nucleotide analogues have been found to exhibit substantially lower toxicity in vivo than their uncyclized analogues, while retaining essentially the same antiviral activity. This was unexpected because the prior art suggested that the cyclic analogues offered no significant advantages in respect to toxicity. This finding permits the administration of much greater doses of the cyclic congeners than otherwise would have been possible and allows the clinician to omit toxicity ameliorating interventions. Novel compounds are provided for use in the method of this invention. Novel methods for the preparation of these compounds also are provided.

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