Determination of the Absolute Configuration of β-Chiral Primary Alcohols Using the Competing Enantioselective Conversion Method
2017
Burns, Alexander S. | Wagner, Alexander J. | Fulton, Jennifer L. | Young, Kyle | Zakarian, Armen | Rychnovsky, Scott. D.
A method for determining the absolute configuration of β-chiral primary alcohols has been developed. Enantioenriched alcohols were acylated in the presence of either enantiomer of the enantioselective acylation catalyst HBTM, and the faster reaction was determined by measuring product conversion using ¹H NMR spectroscopic analysis. An empirical mnemonic was developed that correlates the absolute configuration of the alcohol to the faster reacting catalyst. Successful substrates for this method include primary alcohols that bear a “directing group” on the stereogenic center; directing groups include arenes, heteroarenes, enones, and halides.
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