Direct synthesis of 2-methylpyridines <i>via</i> I<sub>2</sub>-triggered [3 + 2 + 1] annulation of aryl methyl ketoxime acetates with triethylamine as the carbon source
A facile and efficient [3 + 2 + 1] annulation of aryl methyl ketoximeacetates and triethylamine for the synthesis of 2-methylpyridines was disclosed. This reaction demonstrated that I2 was effective in triggering N–O bond cleavage of oxime acetates generating imine radicals. It was noteworthy that this transformation employed triethylamine as the carbon source for the direct formation of pyridines