24871-54-3Relevant academic research and scientific papers
An efficient and cost-effective preparation of di-O-acetyl-d-rhamnal
Miller, Justin N.,Pongdee, Rongson
, p. 3185 - 3187 (2013)
We have developed a synthetic route to the frequently utilized deoxysugar building block di-O-acetyl-d-rhamnal originating from the inexpensive starting material methyl α-d-glucopyranoside. Our approach proceeds in five steps with minimal column chromatography purification needed to afford the title compound in good overall yield.
A General Synthesis of Iminosugars
McDonnell, Ciaran,Cronin, Linda,O'Brien, Julie L.,Murphy, Paul V.
, p. 3565 - 3568 (2007/10/03)
1-Deoxynojirimycin, 1-deoxymannojirimycin, and 1-deoxygalactostatin have been synthesized by epoxidation of tri-O-acetyl-6-deoxyhex-5-enopyranosyl azides followed by methanolysis, deacetylation, and catalytic hydrogenation. 1,6-Dideoxygalactostatin was obtained by the reaction of 2,3,4-tri-O-acetyl-6-deoxy-β-L-arabino-hex-5-enopyranosyl azide with NIS in methanol followed by deacetylation and catalytic hydrogenation. The overall yields were 4.4-23.5% over seven to nine steps.
Difructose dianhydrides from sucrose and fructo-oligosaccharides and their use as building blocks for the preparation of amphiphiles, liquid crystals, and polymers
Garcia Fernandez,Gadelle,Defaye
, p. 249 - 269 (2007/10/02)
Controlled selective protonic activation of the fructosyl moiety in sucrose and fructo-oligosaccharides, with pyridinium poly(hydrogen fluoride) at 20°C, yielded either the kinetic product α-Dfructofuranose β-D-fructofuranose 1,2':2,1'-dianhydride (1), or its thermodynamically more stable isomer α-D-fructofuranose β-D-fructopyranose 1,2' :2,1'-dianhydride (2), depending on the hydrogen fluoride-pyridine ratio. A similar reaction was performed with 6,6'-dichloro-6,6'-dideoxysucrose, or 6,6'-dideoxy-6,6'-diiodosucrose, using a slightly higher ratio of HF resulting in the corresponding 6-deoxy-6-halo-α-D-fructofuranose 6'-deoxy-6' -halo-β-D-fructofuranose 1,2':2,1'-dianhydride derivatives. Both 6,6'-dihalides were converted, upon action of the appropriate nucleophile, into the difructofuranose dianhydride derivatives bearing the 6,6'-di-S-heptyl-6,6'-dithio, 6,6'-diazido-6,6'dideoxy and then 6,6'-diamino-6,6'-dideoxy functionalities, 6-Chloro-6-deoxy and 6-deoxy-6-iodo derivatives of 2 were also prepared by direct halogenation, and further converted into the 6-S-heptyl-6-thio, 6-azido-6-deoxy and then 6-amino-6-deoxy derivatives of 2. Reaction of chloromethyloxirane with 1 or 2 yielded hydrophilic polymers. The 6,6'-di-S-heptyl-6,6'-dithio derivative of 1 displayed liquid crystal properties. The 6,6'-dideoxy-6,6'-diiodosucrose precursor was prepared by the reaction of Garegg's iodine-imidazole-triphenylphosphine reagent with sucrose in N,N-dimethylformamide solution. Controlled selective protonic activation of the fructosyl moiety in sucrose and fructo-oligosaccharides, with pyridinium poly(hydrogen fluoride) yielded either the kinetic product α-D-fructofuranose β-D-fructofuranose 1,2′:2,1′-dianhydride (1) or its thermodynamically more stable isomer. Several derivatives were also prepared from a similar reaction with 6,6′-dichloro-6,6′-dideoxysucrose, or 6,6′-dideoxy-6,6′-diiodosucrose. Reaction of chloromethyloxirane with 1 and its isomer gave hydrophilic polymers. The 6,6′-dideoxy-6,6′-diiodosucrose precursor was prepared by the reaction of Garegg's iodine-imidazole-triphenylphosphine reagent with sucrose in N,N-dimethylformamide solution.
