Design of a bisamidinium Claisen rearrangement catalyst for monodentate substrates.

[摘要]：A bisamidinium catalyst has been designed for the Claisen rearrangement. The primary design feature is a dual hydrogen bonding array that can coordinate a singular oxygen atom of the substrate. The ability to function as a dual hydrogen donor is key as the bisamidinium accelerates the Claisen rearrangement to a greater extent than Bronsted acids with lower pKa values.

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