SYNTHESIS AND REACTION OF 6,7-DIHYDROAZIRINO[1,2-a]THIENO[2,3-d] PYRIDIN-8-ONE

6,7-Dihydroazirino[1 ,2-a]thieno[2,3-d]pyridin-8-one 7 was synthesized and its base-catalyzed ring-opening leading to 4,5-dihydro-8H-thieno[3,2-c]azepin-8-one 8 was studied.