Boyce GR, Musolino SF, Yang J, Smith AD, Taylor JE. Arylboronic Acid-Catalyzed Racemization of Secondary and Tertiary Alcohols.
J Org Chem 2022;
87:13367-13374. [PMID:
36075004 PMCID:
PMC9552221 DOI:
10.1021/acs.joc.2c01602]
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Abstract
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The use of 2-carboxyphenylboronic acid (5 mol %) and
oxalic acid
(10 mol %) with 2-butanone as a solvent for the racemization of a
range of enantiomerically pure secondary and tertiary alcohols is
demonstrated. The process is postulated to proceed via reversible
Brønsted acid-catalyzed C–O bond cleavage through an achiral
carbocation intermediate.
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