... Reaction of Diketene with Isoquinolines in the Presence of Carboxylic Acids?) HIROSHI YAMANAKA,* TAKAYUKI SHIRAISHI, TAKAO SAKAMOTO, and HITOMI MATSUDA Pharmaceutical Institute, Tohoku ... 29 (1981) /\ / 2 N diketene /\/\N zN\/\I diketene AN\/\I ' H 111 RCOO? ...