DOI: 10.1055/s-00000083

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In contrast to DABCO, quinuclidine, or triethylammonium salts the herein used trimethylammonium salts cannot undergo Hofmann elimination reactions. A possible side reaction that sometimes occurs with all these ylides is the Stevens rearrangement: Maeda Y, Sato Y.
J. Chem. Soc., Perkin Trans. 1 1997; 1491

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