An efficient and practical synthesis of naturally occurring marine
nucleosides 5′-deoxytubercidins on
a 10 gram scale in good overall yield is reported. The key step
was the Vorbrüggen glycosylation of pyrrolo[2,3-d]pyrimidines with 5-deoxy-1,2,3-tri-O-acetyl-β-d-ribofuranose.
5′-deoxytubercidin - Vorbrüggen glycosylation - pyrrolo[2,3-d]pyrimidine - marine nucleoside - 7-deazapurine