Ferrocene derivatives. Part 24. Synthesis of dihydro-2-pyrindines and dihydro-3H-2-cyclopent[c]azepines by photolysis of their cyclopentadienyliron derivatives

Abstract

Bischler-Napieralski type cyclizations of N-acyl-2-ferrocenylethylamine and N-acyl-3-ferrocenylpropylamine lead respectively to cyclopentadienyl(dihydro-2-pyrindin-5-yl)iron and cyclopentadienyl(tetrahydrocyclopent[c]azepine)iron derivatives. Photolysis of their quarternary ammonium salts liberates the metal-free azabicyclic systems.