Facile two-pot syntheses of novel alternating benzene/imidazole systems

The novel alternating benzene/imidazole systems with more than three consecutive aromatic rings were prepared by multi-component reaction of c-hexylisocyanide, substituted benzoic acid, n-butylamine, and phenylglyoxal hydrate, followed by condensation with ammonia. The two-pot syntheses were carried out easily with good yields.