Lithium hydroxide, monohydrate → Tert-butyl 6-(4-carboxyphenyl)-spiro[2.5]octane-1-carboxylate

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Reaction Steps

0.159 g of tert-butyl 6-(4-ethoxycarbonylphenyl)spiro[2.5]octane-1-carboxylate (0.44 mmol, 1 eq.) is placed in 4 mL of a 3/1 mixture of THF/methanol in a 50 mL round-bottomed flask. 0.075 g of lithium hydroxide monohydrate (1.78 mmol; 4 eq.) dissolved in 1 mL of water is added with stirring. After 16 hours at room temperature, the reaction medium is evaporated and aqueous 6% sulfur dioxide solution is added. The precipitate is filtered off to give 0.122 g of tert-butyl 6-(4-carboxyphenyl)-spiro[2.5]octane-1-carboxylate.

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