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11 Nov 2019
PREPARATION OF GLUCOSE PENTAACETATE In this experiment you are asked to acetylate all of the hydroxyl groups of the comm on sugar D- glucose. One interesting question we will ty to answer is that of the structure of the pen solution, glucose exists as a mixture of several isomeric structures, shown equilibrium between the aldehyde form and the two stereoisomeric cyclic hemiacetals, nam glucose. below, as the result of the α-and β-D- HOH HO α-D-Glucose HOH O H H20H H20H D-Glucose OH OH β-D-Glucose We will try to determine by using IR and NMR spectra whether the pentaacetate formed is the linear aldehyde pentaacetate or one of the α or β isomers of the acetylated cyclic hemiacetal and, if so, which one.
PREPARATION OF GLUCOSE PENTAACETATE In this experiment you are asked to acetylate all of the hydroxyl groups of the comm on sugar D- glucose. One interesting question we will ty to answer is that of the structure of the pen solution, glucose exists as a mixture of several isomeric structures, shown equilibrium between the aldehyde form and the two stereoisomeric cyclic hemiacetals, nam glucose. below, as the result of the α-and β-D- HOH HO α-D-Glucose HOH O H H20H H20H D-Glucose OH OH β-D-Glucose We will try to determine by using IR and NMR spectra whether the pentaacetate formed is the linear aldehyde pentaacetate or one of the α or β isomers of the acetylated cyclic hemiacetal and, if so, which one.
Hubert KochLv2
5 May 2019