An efficient synthesis of pyrrolo[1,2‐<i>a</i>]quinazolin‐5(1<i>H</i>)‐one derivatives with the aid of low‐valent titanium reagent

Abstract

Abstract A short and facile synthesis of 2,3,3a,4‐tetrahydropyrrolo[1,2‐ a ]quinazolin‐5(1 H )‐ones and 2,3,3a,4‐tetrahydropyrrolo[1,2‐ a ]quinazoline‐1,5‐diones in good yields via the novel reductive cyclization of 2‐nitrobenzamides with haloketones or 4‐oxopentanoic acid promoted by low‐valent titanium reagent is described. J. Heterocyclic Chem., (2011).