A Facile Synthesis of Novel [4‐(Aryl)‐3a,4,5,9b‐tetrahydrocyclopenta[c]quinolin‐8‐ylmethyl]‐8′‐(4′‐aryl)‐3a′,4′,5′, 9b′‐tetrahydro‐3H‐cyclopenta[c]quinolines: Indium Trichloride Catalyzed Intermolecular Imino Diels–Alder Reaction of Cyclopentadiene with Schiff's Bases

Abstract

A simple and efficient method for the synthesis of the title compounds from Schiff's bases derived from 4,4′‐diaminodiphenylmethane and excess of cyclopentadiene using anhydrous indium trichloride as a catalyst is described.

Keywords:

• Heterodiene
• Nitrogen heterocycles
• Indium trichloride
• Cyclopentadiene

Acknowledgment

Research fellowship to one of the authors (S.N.) by the Council of Scientific and Industrial Research, India is gratefully acknowledged.