Ring-Opening of 3-beta-D-ribofuranosyl-3,7,8,9-Tetrahydropyrimido [1,2-i]purin-8-ol and preparation of 2-thio- and 2-aza-adenosine derivatives.

Ring-Opening of 3-beta-D-ribofuranosyl-3,7,8,9-Tetrahydropyrimido [1,2-i]purin-8-ol and preparation of 2-thio- and 2-aza-adenosine derivatives.