Abstract
3',5'-Cyclic nucleotides play a fundamental role in modern biochemical processes and have been suggested to have played a central role at the origin of terrestrial life. In this work, we suggest that a formamide-based systems chemistry might account for their availability on the early Earth. In particular, we demonstrate that in a liquid formamide environment at elevated temperatures 3',5'-cyclic nucleotides are obtained in good yield and selectivity upon intramolecular cyclization of 5'-phosphorylated nucleosides in the presence of carbodiimides.
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