Summary
3-Aryl-7-(2-deoxy-β-D-erythro-pentofuranosyl)-3,7-dihydro-4H-pyrrolo[2,3-d]-pyrimidin-4-imines (4) as well as 4-arylamino-7-(2-deoxy-β-D-erythro-pentofuranosyl)-2-methyl-5-phenyl-7H-pyrrolo[2,3-d]pyrimidines (7) have been synthesized by glycosylation of the sodium salt of the corresponding nucleobases with 2-deoxy-3,5-di-O-p-toluyl-β-D-erythro-pentofuranosyl chloride (2) followed by subsequent deprotection with sodium methoxide in methanol. The deprotected nucleoside4 undergoes aDimroth rearrangement on reflux for 24 h in water to furnish the 4-arylamino nucleoside7.
Zusammenfassung
3-Aryl-7-(2-deoxy-β-D-erythro-pentafuranosyl)-3,7-dihydro-4H-pyrrolo[2,3-d]-pyrimidin-4-imine (4) und 4-Arylamino-7-(2-deoxy-β-D-erythro-pentofuranosyl)-2-methyl-5-phenyl-7H-pyrrolo[2,3,-d]pyrimidine (7) wurden durch Glycosylierung der Natriumsalze der entsprechenden Nucleosidbasen mit 2-Deoxy-3,5-di-O-p-toluyl-β-D-erythro-pentofuranosylchlorid (2) und anschließende Entfernung der Schutzgruppe mit Natriummethoxid in Methanol hergestellt. Das entschützte Nucleosid4 ergibt bei 24-stündigem Erhitzen in Wasser unter Rückfluß über eineDimroth-Umlagerung das 4-Aminonucleosid7.
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Zahran, M.A., Pedersen, E.B. & Nielsen, C. Synthesis and reactions of 2-deoxy-β-D-ribofuranosyl derivatives of 3-aryl-4H-pyrrolo[2,3-d]pyrimidin-4-imines. Monatsh Chem 126, 1271–1277 (1995). https://doi.org/10.1007/BF00824307
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DOI: https://doi.org/10.1007/BF00824307