While this manuscript was under review, Rodriguez, Coquerel et al. reported the resembling results on generation of 2-pyridylidenes from pyridine and arynes, and interception of these intermediates with isatin derivatives. For details, see: Nawaz F, Mohanan K, Charles L, Rajzmann M, Bonne D, Chuzel O, Rodriguez J, Coquerel Y.
Chem. Eur. J. 2013;
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