Palladium(II)-assisted activation of thioglycosides.
Palladium(II)-assisted activation of thioglycosides.
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DOI:
10.1039/d1ob00004g
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发表时间:
2021-03-11
影响因子:
3.2
通讯作者:
Demchenko AV
中科院分区:
文献类型:
--
作者:
Escopy S;Singh Y;Demchenko AV
Described herein is the first example of glycosidation of thioglycosides in the presence of palladium(ii) bromide. While the activation with PdBr2 alone was proven feasible, higher yields and cleaner reactions were achieved when these glycosylations were performed in the presence of propargyl bromide as an additive. Preliminary mechanistic studies suggest that propargyl bromide assists the reaction by creating an ionizing complex, which accelerates the leaving group departure. A variety of thioglycoside donors in reactions with different glycosyl acceptors were investigated to determine the initial scope of this new reaction. Selective and chemoselective activation of thioglycosides over other leaving groups has also been explored.
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通讯作者:
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