An improved preparation of 2,3,5-tri-O-acyl-β-d-ribofuranosyl azides by the Lewis acid-catalysed reaction of β-d-ribofuranosyl acetates and trimethylsilyl azide: an example of concomitant formation of the α anomer by trimethylsilyl triflate catalysis
Novel nucleobase-modified cADPR mimics were synthesized by the application of clickchemistry. Cu(I)-Huisgen cycloaddition (click reaction) was used to construct 4-amide-1,2,3-triazole nucleobase and connect two building blocks efficiently. A concise protection strategy was used for the synthesis of the corresponding cyclo-pyrophosphate, and the target compounds 6a and 6b were prepared within four