Favorskii Reaction
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The rearrangement of cyclopropanones, often obtained as intermediates from the base-catalyzed reaction of α-halo ketones, leading to carboxylic acids and derivatives.
Mechanism of the Favorskii Reaction
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Esters are obtained if alkoxide bases are used:
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A direct conversion from α-halo ketones is possible:
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Ring-contraction:
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