Novel Generation of PyridiniumYlides fromN-(Silylmethyl)pyridone Analogs via1,4-Silatropy and their 1,3-Dipolar Cycloadditions Leading toN-Heteropolycycles
Novel Generation of PyridiniumYlides from<i>N</i>-(Silylmethyl)pyridone Analogs via1,4-Silatropy and their 1,3-Dipolar Cycloadditions Leading to<i>N</i>-Heteropolycycles
Non-stabilized pyridinium methylides were successfully generated from N-(siliymethyl)pyridone analogs via 1,4-silatropy and the resulting 1,3-dipoles were trapped by reaction with acetylenic and olefinic dipolarophiles to afford N-heteropolycycles. The method does not require the use of any additives or strong bases.