Ethyl glucoside

These are unstable and known only in solution. The ethyl glucosides can be obtained crystalline and other derivatives are known. 

Corresponding to the two structurally isomeric forms of glucose and other monoses there are also two types of glucosides, each of which exists in two enantiomorphs. All the four ethyl glucosides are known. 

The latter two successful processes were combined in the solvent-free lipase-catalyzed reaction of 1-O-ethyl glucoside with trimethylene carbonate or -caprolactone to form amphiphilic oligomers and polymers [20]. The products are biodegradable polycarbonates and polyesters that are formed regioselectively by reaction with the primary hydroxyl group of the sugar moiety. 

Ethyl glucoside as a multifunctional initiator for enzyme-catalyzed regioselective lactone ring-opening polymerization. J. Am. Chem. Soc.,... 

Problem 18.47. Show equations for the formation of the following compounds from the corresponding monosaccharides (a) ethyl -glucoside, (b) /3-2-deoxyribose-5-phosphate. 

Et glycoside See Ethyl glucoside, E-25 Allyl glycoside See Allyl glucopyranoside, A-94... 

Furthermore, tiie products wo% characterized by electrospray ionization mass spectrometry (ESI MS). The ESI MS analyses of the organosilicon carbohydrate products (Rgures 2-3) support the selective formation of an ester bond between one hydroxyl group of the o,P-ethyl glucoside molecules and the diacid siloxanes. For clarification in Figure 2, the non-reactive cyano functionality was an impurity in the commercial diacid disiloxane starting... 

The first alkyl glucoside was synthesized and identified in the laboratory by Emil Fischer in 1893 [1], This process is now well known as the Fischer glycosida-tion and comprises an acid-catalyzed reaction of glycoses with alcohols. The structure of ethyl glucoside was defined correctly by Fischer, as may be seen from the historical furanosidic formula proposed ( Fischer projection ). In fact, Fischer glycosidation products are complex, mostly equilibrium mixtures of a/p-anomers and pyranoside/furanoside isomers which also comprise randomly linked glycoside oligomers (Fig. 1) [2]. 

The esterification of the free -COOH terminus of pHAs by fatty alcohol enhances their physical properties, namely, the viscosity is lowered and VI increased with low melting temperature characteristics retained (12,24). The formation of an ester bond between a pHA chain and fatty alcohol can occur chemically (12,30) or enzymatically without destruction of the pHA s ester bonds (24). In addition, Hayes and Kleiman successfully esterified di- and poly(hydoxy acid) synthesized chemically to the hydroxyls of 1,10-decanediol via biocatalysis at high yield (24). The resultant materials had melting point temperatures < -17°C and VI values > 150 (24). Also, Gross and co-workers synthesized a star polymer containing a ethyl glucoside core and pCL and poly(lactide) arms via a chemo-enzymatic approach (43). 

Ethyl glucoside C8-C18 acids 6-O-Monoesters C. antarctica lipase [28]... 

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