chem 2510 lab 7 final - Experiment 7 Report Chem 2510...

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Experiment 7 Report Chem 2510
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Introduction : In this experiment, baker’s yeast was used as a chiral reducing medium to reduce an achiral starting material (ethyl acetoacetate) into a chiral product. The process was enantioselective and two isomers were formed, one preferentially over the other. IR spectroscopy of both the ethyl acetoacetate and the yeast product and polarimetry of the yeast product were used to support the identification of the product (IR spectra and Table 3). Results and Discussion: The starting products were massed (Table 1). During week 2 after filtration of the yeast solution and extraction with ethyl ether, the ether extracts were dried off using MgSO4 and then heating upon a steam bath to evaporate the ether. The final mass of ethyl-3-hydroxybutanoate (alcohol product) was determined. The mass and percent yield of the chiral products were determined (Table 3). IR spectrums were obtained for both ethyl acetoacetate and the yeast product and polarimetry was performed on the yeast product (IR spectra and Table 3). %ee was
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This note was uploaded on 01/10/2009 for the course CHEM 2510 taught by Professor Russo,s during the Fall '07 term at Cornell University (Engineering School).

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chem 2510 lab 7 final - Experiment 7 Report Chem 2510...

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