Li Z, Shen W, Cao C, Wang Z, Zhang Y, Xue W. Thiourea-Cu(OTf)
2/NIS-synergistically promoted stereoselective glycoside formation with 2-azidoselenoglycosides or thioglycosides as donors.
Org Biomol Chem 2024;
22:2137-2144. [PMID:
38385160 DOI:
10.1039/d4ob00064a]
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Abstract
A novel promoter system for glycosylation is described. A catalytic amount of thiourea and Cu(OTf)2 together with a slight excess of N-iodosuccinimide synergistically promotes glycosylation at room temperature. The combination of reagents applies to some 2-azidoselenoglycoside and thioglycoside donors. A wide range of alcoholic acceptors underwent smooth conversion to O-(2-azido)glycosides with good stereoselectivities. In addition, the value of this method has been highlighted by its convenient operation and outstanding functional group compatibility.
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