Formation of Aromatic Rings through Enamine Annulation
摘要:
[GRAPHICS]Condensation of pyrrolidine enamine of ketones with 1,4-diacetoxy-2-butanone provides a new, concise synthetic route to substituted benzenes, dihydroindenes, tetrahydronaphthalenes, and di- and octahydrophenanthrenes. The reaction produced modest yields with regiocontrol of the secondary amine substituent.