Photochemical cyclisation of 2',3'-0-isopropylidene-8-phenylthioadenosine to the 8,5'(R)- and 8,5'(S)-cycloadenosines (nucleosides and nucleoti

Add time:08/27/2019    Source:sciencedirect.com

Photo-irradiation of 2',3-0-isopropylidene-8-phenylthioadenosine in the presence of the peroxides afforded the 8,5'-cyclonucleosides, which, after deacetonation, gave 8,5'(S)- and 8,5'(R)-cycloadenosine, the anti-type fixed model of adenosine. The absolute configurations of the 5'-carbon in these nucleosides were determined by NMR measurements.

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