Add time:09/07/2019         Source:sciencedirect.com

2- and 4-Nitrophenyl β-d-xylopyranosides (4 and 5) were transformed, via dibutyltin oxide-mediated acylation, into the corresponding 2,3-di-O-benzoyl derivatives 11 and 15. Xylobiose and xylotriose were easily isolated by charcoal column chromatography from a commercially available material and converted into the di- and trisaccharide methyl 1-thio-β-glycosides 36 and 37. The 2- and 4-nitrophenyl β-glycosides of the β-(1 → 4)-d-xylo-oligosaccharides of dp 2–4 were synthesized by N-iodosuccinimide-silver triflate-promoted condensation using 11 and 15 as the glycosyl acceptors and ethyl 1-thio-β-d-xylopyranoside triacetate 16, 36, and 37 as the glycosyl donors. Also described are an improved preparation of 4 and 5, and the synthesis of 1-naphthyl β-d-xylopyranoside, as well as an alternative approach to the 2- and 4-nitrophenyl β-xylobiosides.

We also recommend Trading Suppliers and Manufacturers of 2,2-dimethyl-6-(4-nitrophenyl)-4-phenyl-1,3-diazabicyclo[3.1.0]hex-3-ene (cas 15757-54-7). Pls Click Website Link as below: cas 15757-54-7 suppliers