“…methy1acetamido)pyridiniw-n iodide.13 Therefore pyridinium salts (5), (6), and ( 7), having R2 = H, and R3 = H, Me, and Ph, respectively, were treated with thiolate ions, and as can be seen from Table 1, intermediates ( 11) -( 13) were isolated, some in very good yield [e.g. (lla), (Ilk), and (13d)l.f This result appears to substantiate the reversibility of thiolate addition under the conditions described here.…”