a convenient procedure for friedlander synthesis of quinoline derivatives catalyzed by zirconium dodecylphosphonate as an efficient and reusable catalyst

2-amino-substituted ketones react with α-methylene ketones under solvent-free conditions at 90 °c in thepresence of a catalytic amount of zirconium dodecylphosphonate to create the corresponding quinolinesin excellent yields. this procedure recommends numerous advantages such as easy work-up, use of mild,reusable and safe catalyst, short reaction timeand high yields. the new compounds have been characterizedby 1h-nmr, 13c-nmr, mass and elemental analysis data.