The condensation of phenylacetaldehyde, acetaldehyde and ammonia under pressure is shown to give rise to a mixture of 3, 5-diphenylpyridine, 3, 5-diphenyl-2-methylpyridine and 2-methyl-5-phenylpyridine. Phenylacetaldehyde, propionaldehyde and ammonia give 3, 5- diphenylpyridine, 3, 5-diphenyl-2-ethylpyridine, 2-ethyl-3-methyl-5-phenylpyridine and 3- methyl-5-phenylpyridine in addition to a benzyldiphenylpyridine, probably the 2-benzy1-3, ...
