The Synthesis and Spectra of α,β-Unsaturated Aliphatic Azo Compounds^1,2

Synthesis of amines by the electrophilic amination of organomagnesium, -zinc, -copper, and -lithium reagents

“…81,127 Phenylcopper, lower-and higher-order homocuprates, and lower-and higher-order heterocuprates react with 5a to give aniline in low to moderate yields, at room temperature after 3 h (Scheme 42). …”

The Synthesis of a 5,6-Dihydropyridazine

“…Since cis-azomethane absorbs at 353 nm (9) and 10 and 11 such change as occurs should surely be lowered in the geometry defined by 1 rather than 4 by something like 0.75 eV. 4 An alternative possiblity is that the bands do not represent the same transition, and that relevant bands may be submerged under the other absorption, or be of very low i n t e n~i t y .~ The observation by Arnold and his co-workers (1 3) in a study of five-, six-and seven-membered cyclic 1,4-diaza-1,3-dienes of abnormal spectral changes may be relevant. They found that the long wavelength absorption maximum (normally attributed to an n + x* transition) of 2,3-diphenyl-5,6-dihydropyrazine (12) to be at significantly longer wavelength than either of the related five-or seven-membered equivalents.…”