Oxidative cyclization of dialdehydes with alcohols and 1,3-dicarbonyl compounds under Rh(III)/Cu(II) conditions
2015
Matsuda, Takanori | Suzuki, Kentaro | Abe, Shinya | Kirikae, Haruki | Okada, Noboru
For the preparation of 3-alkoxyphthalides from phthalaldehydes and alcohols, a cyclization reaction in the presence of a rhodium(III) catalyst and copper(II) salt is reported. Cyclization of phthalaldehydes also occurs with 1,3-dicarbonyl compounds under similar conditions to produce 3-substituted phthalides in good yields. An acylrhodium(III) species might be a key intermediate in these cyclization reactions.
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