244-42-8Relevant articles and documents
SYNTHESIS OF 3-AZAFLUORENE AND 2H-2-METHYLINDENOPYRIDINE
Prostakov, N. S.,Radzhan, P. K.,Soldatenkov, A. T.
, p. 1153 - 1156 (2007/10/02)
4-Methyl-3-phenylpyridine was isolated from the mixture of four isomeric methylphenylpyridines formed in the condensation of crotonaldehyde with phenylacetaldehyde (β-phenylethanol or phenylacetylene) with ammonia in the presence of a cadmium-calcium phosphate catalyst. 4-Methyl-3-phenylpyridine was converted to 3-azafluorene by catalytic dehydrocyclization.A representative of a new series of pseudoazulenes, viz., 2H-2-methylindeno-pyridine, was obtained by treatment of 3-azafluorene methiodide with sodium hydroxide solution; the product was a crystalline black substance that remained unchanged during storage in air for 1 month.