67659-01-2Relevant academic research and scientific papers
Rearrangement of arylhydrazones of aromatic and arylaliphatic carbonyl compounds to biphenyl derivatives. 3
Fusco, R.,Sannicolo, F.
, p. 83 - 89 (2007/10/02)
The behavior toward polyphosphoric acid of arylhydrazones of aromatic carbonyl compounds (anisaldehyde, substituted benzophenones, (4-methoxyphenyl)glyoxylic acid esters) and arylaliphatic ketones (4-methoxy- and 4-aminoacetophenone) is described.Biphenyl derivatives are formed through a sigmatropic rearrangement, which often occurs in competition with the expected Fischer indole synthesis and, in the case of the 4-amino-acetophenone 2,6-dimethylphenylhydrazone, with a completely new sigmatropic rearrangement.
