zahia kibouchoukchou-braham noureddinedidier villemincheikh naoualbelhadj fatma zohra2013-02-262013-02-262012https://dspace.univ-tlemcen.dz/handle/112/1480Heterocyclic synthesis directed toward "Green Chemistry" have attained increasing interest in resent years should lead to new envirenmentally benign procedures to save resources and energynitrogen heterocycles, green chemistry, 4-amino-5H-chromeno (3,4-C) pyridin-5-one4methyl2oxo2H-chromene3-carbonitrileNEW AND EFFICIENT SYNTHESIS OF NITROGEN HETEROCYCLES AMINO-5H-CHROMENO (3,4-c) PYRIDIN-5-ONE