The synthesis ofN-acetyl-β-l-fucosamine-1-phosphate and uridine 5′-diphospho-N-acetyl-β-l-fucosamine
作者:P. A. Illarionov、V. I. Torgov、I. Hancock、V. N. Shibaev
DOI:10.1007/bf02494930
日期:2000.11
Uridine5′-(2-acetamido-2,6-dideoxy-β-l-galactopyranosyl) diphosphate (uridine5′-diphospho-N-acetyl-β-l-fucosamine) was synthesized. The key intermediate, 3,4-di-O-acetyl-2-azido-2,6-dideoxy-β-l-galactopyranosyl dibenzyl phosphate, was prepared by a previously unknown reaction of cesium dibenzyl phosphate with the corresponding α-glycosyl nitrate and was then converted into theN-acetylated glycosyl
Total synthesis of LewisX using a late-stage crystalline intermediate
作者:Stefan Munneke、Gavin F. Painter、Graeme J. Gainsford、Bridget L. Stocker、Mattie S.M. Timmer
DOI:10.1016/j.carres.2015.05.017
日期:2015.9
Herein, we report on a highly efficientsynthesis of a crystalline protected Lewis(X) trisaccharide that was converted to Lewis(X) following global deprotection. The trisaccharide was prepared in a highly convergent synthesis (seven steps, longest linear sequence) and in a 38% overall yield using a strategy that involved the regioselective glycosylation of a GlcNAc acceptor with a galactose thioglycoside
Lewis acid promoted anomerisation of alkyl O- and S-xylo-, arabino- and fucopyranosides
作者:Lisa M. Doyle、Fiach B. Meany、Paul V. Murphy
DOI:10.1016/j.carres.2018.11.010
日期:2019.1
and 6-deoxyhexopyranosides, such as those from d-xylose, l-arabinose and l-fucose are components of natural products, oligosaccharides or polysaccharides. Lewis acid promoted anomerisation of some of their alkyl O- and S-glycopyranosides is reported here. SnCl4 was more successful than TiCl4, with the latter giving the glycosyl chloride by-product in some cases, and both were superior to BF3OEt2. Kinetics
A new and efficient strategy for the synthesis of shimofuridin analogs: 2′-O-(4-O-stearoyl-α-l-fucopyranosyl)thymidine and -uridine
作者:Jun Ning、Ying Xing、Fanzuo Kong
DOI:10.1016/s0008-6215(02)00356-7
日期:2003.1
Two shimofuridin analogs: 2'-O-(4-O-stearoyl-alpha-L-fucopyranosyl)thymidine (2) and -uridine (3) have been synthesized using D-arabinose, L-fucose, thymine, uracil, and stearoyl chloride as the starting materials. The synthetic procedures involve the facile preparation of 1-(3,5-di-O-benzyl-beta-D-ribofuranosyl)thymine (9) and -uracil (10) by coupling of 1,2-anhydro-3,5-di-O-benzyl-alpha-D-ribofuranose
The use of cesium dibenzyl and diphenyl phosphates for stereoselective synthesis of glycosyl phosphate derivatives
作者:P. A. Illarionov、V. I. Torgov、V. N. Shibaev
DOI:10.1007/bf02494931
日期:2000.11
Peracetates of β-glycosyl dibenzylphosphates are formed efficiently in the reaction of cesium dibenzylphosphate with peracetyl-α-glycosyl nitrates derived froml-fucopyranose,d-galactopyranose, and 2-azido-2-deoxy-d-galactopyranose or with tri-O-acetyl-α-l-fucopyranosyl bromide. On the contrary, the reaction of the above-mentioned glycosyl nitrates with cesium diphenyl phosphate leads to thermodynamically