- Tin Chloride-catalyzed Ribosidation of Triazoloinosine
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Condensation of 3-(β-D-ribofuranosyl)-9-(trimethylsiloxy)-3H-s-triazolopurine (3) with 1,2,3,5-tetra-O-acetyl-β-D-ribofuranose in acetonitrile in the presence of tin chloride is regioselective and yields after deacylation 3,5-dihydro-3,5-bis(β-D-ribofuranosyl)-9H-s-triazolopurin-9-one (5).The assignment of the ribosidation site in 5 is based upon carbon-13 chemical shifts observed in the nucleosides 5 and 1 when compared to the anionic form 7.
- Schlimme, Eckhard
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p. 1903 - 1906
(2007/10/02)
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