Quaternization of electron-deficient pyridines containing two electron-withdrawing substituents

Methyl triflate is an efficient agent for the quaternization of nitropyridines containing an additional electron-withdrawing substituent. When triethyloxonium hexachloroantimonate is used as the quaternizing agent, -elimination occurs with formation of protic pyridinium salt and ethylene.M. V. Lomonosov Moscow State University, 119899 Moscow, Russia. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 53–54, January, 2000.