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Updated: Jul 13, 2026

Facile Preparation of (2Z,4E)-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
Published on: June 21, 2017
Direct ester condensation catalyzed by bulky diarylammonium pentafluorobenzenesulfonates
Akira Sakakura1, Shoko Nakagawa, Kazuaki Ishihara
1Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan.
Abstract:
A protocol for ester condensation between equimolar amounts of carboxylic acids and alcohols catalyzed by bulky diarylammonium pentafluorobenzenesulfonate is described. We also present procedures for the synthesis of N-(2,6-diisopropylphenyl)-N-mesitylammonium pentafluorobenzenesulfonate. The present ester condensation proceeds well under mild conditions even without the removal of generated water. The synthesis of N-(2,6-diisopropylphenyl)-N-mesitylammonium pentafluorobenzenesulfonate will take approximately 5 days. The ester condensation reactions will take approximately 6 h to 3 days.
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