Acylarylnitrosamines. Part IV. Aryne participation in decompositions of N-nitrosoacetanilide and its m- and p-t-butyl-, o-, m-, and p-chloro-derivatives in benzene
作者:D. L. Brydon、J. I. G. Cadogan、J. Cook、M. J. P. Harger、J. T. Sharp
DOI:10.1039/j29710001996
日期:——
pairs of arynophiles were allowed to compete (a) for authentic benzyne (b) for the intermediate produced by N-nitrosoacetanilide gave almost identical results in both cases, indicating that benzyne is involved in case (b) also. A mechanism involving removal of a proton ortho- to the diazonium function in the intermediate benzenediazoniumacetate is proposed and an explanation for the anomalous behaviour
Stereodynamics of a series of N,N-dialkyl-9-triptycylamines is studied by 1H and 13C dynamic NMR spectroscopy. The energy barriers to the observed internal motions are governed by the eclipsing interaction between an N-alkyl group and a benzene ring of the triptycene moiety together with the intrinsic barrier to nitrogen inversion.