The detailed processes in the Claisen rearrangement were observed. The process was vibrationally excited in the electronic ground state by a stimulated Raman process using a 5-fs pulse. The Claisen rearrangement was found to follow a three-step pathway. At first, the C4-O bond is weakened to generate a bisallyl-like intermediate. Next, the formation of a weak C 1-C6 bond results in the generation of an aromatic-like intermediate. Finally, C4-O breaking and C1-C6 formation occur simultaneously to generate the product. © 2010 The Chemical Society of Japan.
CITATION STYLE
Iwakura, I., Yabushita, A., & Kobayashi, T. (2010). Direct observation of the molecular structural changes during the claisen rearrangement including the transition state. Chemistry Letters. https://doi.org/10.1246/cl.2010.374
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