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Potentially Prebiotic Synthesis of Pyrimidine β‐D‐Ribonucleotides by Photoanomerization/Hydrolysis of α‐D‐Cytidine‐2′‐Phosphate

The “RNA world” hypothesis is consistent with RNA’s being a prebiotic product, or the biotic invention of a precursor genetic system. A prebiotically plausible synthesis of ribonucleotides would help to differentiate between these two possibilities by providing strong support for the first, and, as such, is a major goal. The efficient conversion of d-ribose aminooxazoline 1 to ad-cytidine 2, by treatment with cyanoacetylene was demonstrated over 30 years ago (Scheme 1), 3] but has not gained