On March 19, 2020, Chen, Peiran; Guo, Saisai; Zuo, Junfeng; Chu, Ruiji; He, Xu; Zhu, Guijiang published an article.Name: (2R,3S,4R)-2-(Acetoxymethyl)-3,4-dihydro-2H-pyran-3,4-diyl diacetate The title of the article was Synthesis of 3-S- and 3-Se-glycals by using R-S-S-R and R-Se-Se-R as the nucleophile precursors promoted by Hf(OTf)4 and the temperature-dependent formation of the above-mentioned 3-S- and 3-Se products. And the article contained the following:
By using Hf(OTf)4 as the catalyst, under certain conditions, reaction of tri-O-acetyl-D-glucal and ((2R,3S)-3-acetoxy-2,3-dihydrofuran-2-yl)methyl acetate with alkyl(aryl) bi-sulfide/alkyl(aryl) bi-selenide as nucleophile precursor leads to temperature-dependent formation of C-1-S/Se and C-3-S/Se product. A temperature-dependent profile of the yield of these two products is given. The experimental process involved the reaction of (2R,3S,4R)-2-(Acetoxymethyl)-3,4-dihydro-2H-pyran-3,4-diyl diacetate(cas: 2873-29-2).Name: (2R,3S,4R)-2-(Acetoxymethyl)-3,4-dihydro-2H-pyran-3,4-diyl diacetate
The Article related to ferrier rearrangement sulfuration selenylation catalyst hafnium triflate thioglycosylation, Carbohydrates: Glycosides and other aspects.Name: (2R,3S,4R)-2-(Acetoxymethyl)-3,4-dihydro-2H-pyran-3,4-diyl diacetate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics