¤@. Photolysis of 2-azido-1-(2- pyridyl)ethanone (68),2-azido-1-(3-pyridyl)ethanone) (69),2-azido-1-(1-methyl-2-pyrryl)ethanone (53) and 2-azido-1-(1-methyl-3-indo yl)ethanone gave Norrish products (71, 7 3-76), (84-86, 89), (92-94) and (93, 95-98). ¤G. Pyrolysis of 2-(azidomethyl)pyridine (9) and 4-(azidomethyl)pyr idine (10) gave the expected products 1,3,5-tri-2-pyridyl-2,4-diaza-1,4-pentadiene (13) and 1,3,5-tri-4-pyridyl-2,4-diaza-1,4-pentadiene (21). ¤T. Pyrolysis of 2-cyclohexeno[b]furylmethyl benzoate (31) gave 2-methylbenzo[b]- furan (40) and benzene products.