10.1016/S0040-4020(01)96068-5
The research details the synthesis of nucleoside antibiotics with significant antitumor properties, specifically focusing on 2'-deoxytoyocamycin, 2'-deoxysangivamycin, and related compounds. The purpose of the study was to develop a stereospecific, high-yield glycosylation procedure to synthesize these nucleosides, which are structurally similar to adenosine and exhibit potent antitumor effects. The key chemicals used in the research include 2-bromo-(or ethylthio)-S-ethoxymethyleneemino-pyrrole-3,4-dicarbonitrile, 1-chloro-2-deoxy-3,5-di-O-p-toluoyl-α-D-erythro-pentofuranose, and various other halosugars and heterocyclic compounds. The researchers employed a sodium salt glycosylation procedure, which allowed for the direct attachment of glycon moieties to fully aromatic pyrrole derivatives, resulting in the exclusive formation of β-anomer nucleosides. The synthesized compounds were characterized using various spectroscopic techniques, and the yields were reported for each step of the synthesis. The study concludes that this glycosylation procedure is a versatile and efficient method for synthesizing 2'-deoxyribofuranosyl and arabinofuranosyl nucleosides of the pyrrolo[2,3-d]pyrimidine ring system, providing a direct route for the synthesis of these potential chemotherapeutic agents.