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- W4229365825 abstract "Abstract Several terminal vinyl sulfones, derived from styrene epoxide and monomesylated glycerol were reacted with benzylazide in a metal‐free condition to afford regioselectively 1,4‐disubstituted 1,2,3‐triazoles (1,4‐DTs) via Eliminative Azide‐Olefinic Cycloaddition (EAOC) reactions. The stereoelectronic repulsions between the aryl/alkyl groups attached to the azido and vinyl sulfone functionalities play a significant role in deciding the outcome of the reactions. The N, N ‐dimethyl ethanolammonium formate‐water mixture consisting of a biodegradable ionic liquid turned out to be the best solvent system to reduce significantly the reaction time and increase the yield of products in almost all cases. Furthermore, a pair of exocyclic terminal vinyl sulfone‐modified carbohydrates were prepared from protected‐glucofuranoside and ‐allofuranoside. These carbohydrates were reacted under the EAOC conditions with a host of organic azides to afford the corresponding 1,4‐disubstituted 1,2,3‐triazole modified carbohydrates. Azido sugars were also reacted with terminal vinyl sulfone modified carbohydrates under similar conditions to afford 1,4‐disubstituted 1,2,3‐triazole linked bissacharides. This powerful strategy serves as a potential yet practical route for delivering two carbon unit (required for the C4‐C5 of the 1,2,3‐triazole ring) directly connected to sugar body in place of a sugar alkyne." @default.
- W4229365825 created "2022-05-10" @default.
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- W4229365825 date "2022-05-09" @default.
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- W4229365825 title "Synthesis of 1,4‐Disubstituted 1,2,3‐Triazoles from Terminal Vinyl Sulfones in Ionic Liquid: A Metal‐Free Eliminative Azide‐Olefinic Cycloaddition Route to Triazolyl Carbohydrates and Triazole‐linked Bissaccharides" @default.
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- W4229365825 doi "https://doi.org/10.1002/ejoc.202200189" @default.
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