Tandem Knoevenagel-Michael-cyclocondensation reaction of malononitrile, various aldehydes and barbituric acid derivatives using isonicotinic acid as an efficient catalyst Journal title: Progress in Chemical and Biochemical Research Authors: Ahmad Reza Moosavi-Zare, Hamid Goudarziafshar, Zahra Jalilian Subject(s): Biology, Information Science & Library Science, Social Sciences, Interdisciplinary, Humanities, Multidisciplinary, Education & Educational Research, Physics, Multidisciplinary, Agriculture, Multidisciplinary, Education, Scientific Disciplines, Psychology, Educational, Education, Special