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A strategically novel kinetic resolution of β-substituted olefinic carboxylic acids is developed by asymmetric bromolactonization using an organocatalyst, 4-tBuPh-tris 1b. The cyclization stage, which provides δ-lactone, is proposed to be operative for discrimination of each enantiomer of carboxylic acids.
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Murai et al. (2013) studied this question.
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