76265-96-8

Upstream product

• 572-09-8 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl bromide 
• 143-08-8 nonyl alcohol 
• 2280-44-6 D-Glucose 
• 330477-04-8 1-n-nonyl 2,3,4,6-tetra-O-acetyl-β-D-glucopyranoside 
• 4163-60-4 β-D-galactose peracetate 
• 10343-15-4 2,3,4,6-tetra-O-acetyl-1-O-allyl-α-D-galactopyranoside 
• 111-66-0 oct-1-ene 
• 74808-10-9 2,3,4,6-tetra-O-acetyl-D-galactopyranosyl trichloroacetimidate 
• 3947-62-4 2,3,4,6-tetra-O-acetyl-α/β-D-galactopyranose 
• 25878-60-8 D-galactose pentaacetate 
• 433930-44-0 nonyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranoside 
• 604-69-3 β-D-glucose pentaacetate 
• 330477-05-9 Acetic acid (2R,3R,4S,5R,6S)-3,5-diacetoxy-2-acetoxymethyl-6-nonyloxy-tetrahydro-pyran-4-yl ester 
• 29836-26-8 n-octyl β-D-glucopyranoside 

Downstream Products

• 25320-96-1 O-n-pentyl β-D-glucopyranoside 
• 39824-11-8 n-hexyl-β-D-glucopyranoside 

Relevant academic research and scientific papers

Synthesis and anti-tumor-promoting activity of glycoglycerolipid analogues lacking the glycerol backbone

Glycoglycerolipid analogues lacking the glycerol backbone were prepared through a lipase catalyzed transesterification of β-D-galactosylethylene glycol. The inhibitory effect of the resultant isomeric hexanoates at the primary alcoholic positions, β-D-galactosylethylene glycol itself and nonyl β-D-galactopyranoside, was tested on Epstein-Barr virus early antigen (EBV-EA) activation in Raji cells promoted by the tumor promoter 12-O-tetradecanoylphorbol-13-acetate (TPA), as a primary screening test for inhibitors of tumor promotion. All the compounds assayed were found to be less active than the reference 2-O-β-D-galactopyranosylglycerol derivatives, of which they are simplified models, indicating that the anti-tumor-promoting activity is very closely related to the presence of a free hydroxymethylene group on the glycerol-like aglycone moiety.

N-alkyl - β - D - glucopyranoside synthetic method

The invention discloses a synthesizing method of n-alkyl-beta-D-glucopyranoside. The method includes the following steps of dissolving fully-acetylated glucopyranose, n-alkyl alcohol and anhydrous stannic chloride in anhydrous methylene dichloride, stirring the mixture to have a reaction for 20 min to 70 min at the room temperature, washing the mixture through a saturated sodium carbonate solution, collecting organic phases, conducting reduced pressure distillation to obtain 1-n-alkyl-2,3,4,6-tetraacetyl-beta-D-glucopyranoside, dissolving the 1-n-alkyl-2,3,4,6-tetraacetyl-beta-D-glucopyranoside in methyl alcohol, adding sodium methylate to adjust the pH value to 9, having a reaction for 1.5 h at the room temperature, adjusting the pH value to be neutral through strong acid cation exchange resin, conducting filtering, steaming filtrate to obtain solvent, and drying the solvent to obtain the n-alkyl-beta-D-glucopyranoside. The n-alkyl is n-alkyl of C8-C12. The method is simple, raw materials are easy to obtain, cost is low, reaction temperature is moderate and easy to control, the method is environmentally friendly, and the prepared beta-configuration glucopyranoside is high in purity.

Synthesis and Properties of Alkyl β-d-Galactopyranoside

A series of alkyl β-d-galactopyranosides were prepared by the trichloroacetimidate method with d-galactose and alcohols with different chain lengths as raw materials. Their solubility, surface tension, emulsification, foaming, wettability, thermotropic liquid crystalline properties, and thermal stability were investigated. Alkyl β-d-galactopyranosides are soluble in water and ethanol, and the solubility decreases with increasing alkyl chain length. Decyl β-d-galactopyranoside was insoluble in water, but soluble in ethanol. Dissolution of alkyl β-d-galactopyranoside in water is an endothermic process with dissolution enthalpies greater than zero. Nonyl β-d-galactopyranoside had an excellent emulsifying?property, better foaming ability and the best foam stability. The CMC values of alkyl β-d-galactopyranosides decrease with increasing of alkyl chain length. Alkyl β-d-galactopyranosides are thermally stable up to 270?°C. Alkyl β-d-galactopyranosides show the distinctive optical texture of a thermotropic liquid crystal smectic A type phase. Decyl β-d-galactopyranoside showed the strongest wettability.

Chemoenzymatic synthesis of β-D-glucosides using cellobiose phosphorylase from Clostridium thermocellum

Abstract Over the past decade, disaccharide phosphorylases have been successfully applied for the synthesis of numerous α-glucosides. In contrast, much less research has been done with respect to the production of β-glucosides. Although cellobiose phosphorylase was already successfully used for the synthesis of various disaccharides and branched trisaccharides, its glycosylation potential towards small organic compounds has not been explored to date. Unfortunately, disaccharide phosphorylases typically have a very low affinity for non-carbohydrate acceptors, which urges the addition of solvents. The ionic liquid AMMOENGTM 101 and ethyl acetate were identified as the most promising solvents, allowing the synthesis of various β-glucosides. Next to hexyl, heptyl, octyl, nonyl, decyl and undecyl β-D-glucopyranosides, also the formation of vanillyl 4-O-β-D-glucopyranoside, 2-phenylethyl β-D-glucopyranoside, β-citronellyl β-D-glucopyranoside and 1-O-β-D-glucopyranosyl hydroquinone was confirmed by nuclear magnetic resonance spectroscopy and mass spectrometry. Moreover, the stability of cellobiose phosphorylase could be drastically improved by creating cross-linked enzyme aggregates, while the efficiency of the biocatalyst for the synthesis of octyl β-D-glucopyranoside was doubled by imprinting with octanol. The usefulness of the latter system was illustrated by performing three consecutive batch conversions with octanol imprinted cross-linked enzyme aggregates, yielding roughly 2 g of octyl β-D-glucopyranoside.

Significantly Improved Equilibrium Yield of Long-Chain Alkyl Glucosides via Reverse Hydrolysis in a Water-Poor System Using Cross-Linked Almond Meal as a Cheap and Robust Biocatalyst

An array of ten β-D-glucopyranosides with varied alkyl chain lengths were enzymatically synthesized. It was found that for longer alkyl chains a lower initial rate and final yield of glucoside was obtained except for methyl glucoside because of the severe toxicity of methanol to the enzyme. From a thermodynamics point of view, the equilibrium constant and Gibbs free energy variation of the glucoside syntheses were systematically investigated. To improve the final yields of the glucosides containing long alkyl chains the equilibrium of the enzymatic glucoside synthesis was altered. The equilibrium yield of decyl β-D-glucoside increased from 1.9% to 6.1% when the water content was reduced from 10% to 5% (v/v) using tert-butanol as a cosolvent and 0.10 mol/L of glucose as a substrate. As for the other longer alkyl chain glucosides, heptyl β-D-glucoside was found to have significant surface activity as well.

Significantly improved equilibrium yield of long-chain alkyl glucosides via reverse hydrolysis in a water-poor system using cross-linked almond meal as a cheap and robust biocatalyst

An array of ten β-D-glucopyranosides with varied alkyl chain lengths were enzymatically synthesized. It was found that for longer alkyl chains a lower initial rate and final yield of glucoside was obtained except for methyl glucoside because of the severe toxicity of methanol to the enzyme. From a thermodynamics point of view, the equilibrium constant and Gibbs free energy variation of the glucoside syntheses were systematically investigated. To improve the final yields of the glucosides containing long alkyl chains the equilibrium of the enzymatic glucoside synthesis was altered. The equilibrium yield of decyl β-D-glucoside increased from 1.9 to 6.1 when the water content was reduced from 10 to 5 (v/v) using tert-butanol as a cosolvent and 0.10 mol/L of glucose as a substrate. As for the other longer alkyl chain glucosides, heptyl β-D-glucoside was found to have significant surface activity as well.

Synthesis of n-alkyl glucosides by amyloglucosidase

Amyloglucosidase from Rhizopus mold (3.2.1.3) has been employed for the synthesis of n-alkyl glucosides from alcohols of carbon chain lengths Cl to C18 by both shake flask and reflux methods. Glucoside yields obtained from the reflux method (5-44%) are better than those from the shake flask method (3-28%). While the shake flask method favoured glucosylation of medium chain length alcohols, the reflux method at pH 5.0, favoured glucosylation of all the chain lengths. n-Octyl-D-glucoside, n-octyl-maltoside and n-octyl-sucroside are also synthesized and optimum conditions for the synthesis of n-octyl-D-glucoside at both shake flask and reflux methods have been worked out.

A convenient stereoselective synthesis of β-D-glucopyranosides

The Koenigs-Knorr method plays a prominent role in the stereoselective synthesis of alkyl D-glucopyranosides via glycosidic linkage. Such an approach requires costly and toxic promoter salts of silver or mercury, which have additional separation problems. In a novel method a less toxic promoter salt like LiCO3 is used for glycosidation of several fatty alcohols including an aromatic alcohol. LiCO3 can be easily separated from the reaction mass and gives good yield.

BF3 etherate-induced formation of C7-C 16-alkyl β-D-glucopyranosides

BF3 etherate-induced formation of C7-C 16-alkyl D-glucopyranosides is used as the key step in their synthesis from glucose and C7-C16-alkanols.

Novel reaction systems for the synthesis of O-glucosides by enzymatic reverse hydrolysis

Our studies are presented to replace alcohols as solvents in reverse hydrolytic reactions catalyzed by immobilized β-glucosidase to synthesize O-substituted β-D-glucopyranosides in preparative-scale. We found that 1,2-diacetoxyethane is a suitable solvent and O-alkyl or aryl β-D-glucosides were synthesized in moderate yields (after isolation 12-19%). In these reactions proportion of glucose and glucosyl acceptor hydroxy compounds was 1:20. We suggest that 1,2-diacetoxyethane can be useful not only for alcohols but for other glucosyl donor compounds unsuitable for the role of solvent (e.g., phenols) in the synthesis of O-β-D-glucosides by reverse hydrolysis.