A new octahydroacridine with a tert-butoxypropyl group in the 9-position wa
s prepared and was used in the synthesis of new soluble annelated polypyrid
ines. Quinquepyridine with 11 adjacent rings was prepared in 17-25% yield b
y condensation of an alpha-methylene ketone and an enolisable ketone in the
presence of ammonium acetate under basic conditions.