O 2,1 ′ -Anhydro-( β -D-Psicofuranosyl)Thymine and 1-(1 ′ ,4 ′ -O-Anhydro- β -D-Psicofuranosyl)Thymine: The Crystal Structures Versus the 1H NMR and AB Initio Data

The crystal structures of the title compounds 1 and 2 have been determined. Relation between the stereochemistry of both nucleosides in the crystal state and the 1H NMR data in solution as well as the ab initio calculations is discussed.

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