Knoevengel condensation of thiophene 5 with malononitrile gave thiophene derivative 9 (KScnhoeemveen3g).eHl ecaotnindgenthsiaotpiohnenoef9twhiiothphDeMneF/5DMwAithafmforadloendoenniatrmilienognaeve10t.hTihoepshternuectudreersivoaf ttihvieop9hene (dSecrhive6dm–ae8treiaivv,3bea)s.triHev9vee...