Cimafonte M, Esposito A, De Fenza M, Zaccaria F, D’Alonzo D, Guaragna A. Synthesis of Natural and Sugar-Modified Nucleosides Using the Iodine/Triethylsilane System as
N-Glycosidation Promoter.
Int J Mol Sci 2024;
25:9030. [PMID:
39201716 PMCID:
PMC11354600 DOI:
10.3390/ijms25169030]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2024] [Revised: 08/11/2024] [Accepted: 08/12/2024] [Indexed: 09/03/2024] Open
Abstract
The reagent system based on the combined use of Et3SiH/I2 acts as an efficient N-glycosidation promoter for the synthesis of natural and sugar-modified nucleosides. An analysis of reaction stereoselectivity in the absence of C2-positioned stereodirecting groups revealed high selectivity with six-membered substrates, depending on the nucleophilic character of the nucleobase or based on anomerization reactions. The synthetic utility of the Et3SiH/I2-mediated N-glycosidation reaction was highlighted by its use in the synthesis of the investigational drug apricitabine.
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