Katritzky and Rubio system 1 has been its inaccessibility, preparation necessitating the use of Ag20. By an application of our procedure previously reported for the 2, 4, 6-trisubstituted analogues, we now describe a convenient route to l in good yield together with a study of its chemistry, and in particular, concrete evidence for considerable mutual interaction between the pyridinium ring and the vinyl group in both 1 and the triphenyl analogue 2.
[Katritzky, Alan R.; Thind, Sukhpal S. Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1980 , p. 1895 - 1900]
[Katritzky, Alan R.; Manzo, Ruben H. Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999), 1981 , p. 571 - 575]
