An iodine/DMSO-catalyzed sequential one-pot approach to 2,4,5-trisubstituted-1H-imidazoles from α-methylene ketones

A sequential one-pot approach to 2,4,5-trisubstituted imidazoles has been developed from α-methylene ketones and aldehydes. This methodology employs air-moisture stable reaction conditions and an inexpensive iodine/DMSO system affording a diverse range of known and novel (substrate scope) 2,4,5-trisubstituted imidazoles in moderate to excellent yields. The iodine/DMSO system was extended to the domino convergent synthesis of two functionalized intermediates, benzil and benzaldehyde, to produce the final product.

Synthesis of new 3-phenyl Substituted Dibenzo-1,4-diazepin-1-one Derivatives

A new series of 3-phenyl substituted dibenzo-1,4-diazepin-1-one derivatives were synthesised by condensation of 5-phenylcyclohexane-1,3-dione, o-phenylenediamine and benzaldehydes. All the compounds were characterised by IR, MS, 1H NMR and elemental analysis. The crystal structure of 3-phenyl-11-(2-chlorophenyl)-2,3,4,5,10,11-hexahydro-1H-dibenzo[b,e] [1,4]diazepin-1-one was determined by X-ray single-crystal diffraction.

A facile and highly efficient route to α-amino phosphonates via three-component reactions catalyzed by Mg(ClO4)2or molecular iodine

Three-component reactions of aldehydes, amines, and diethyl phosphite catalyzed by Mg(ClO4)2 or molecular iodine afforded the corresponding alpha-amino phosphonates in excellent yields under mild reaction conditions.

Molecular iodine: a highly efficient catalyst in the synthesis of quinolinesvia Friedländer annulation

A mild and efficient route for the synthesis of quinolines and polycyclic quinolines via Friedländer annulation, utilizing molecular iodine (1 mol%) as a new catalyst, is described.