Author's Organization:Faculty of Pharmaceutical Sciences, Kinki University Faculty of Pharmaceutical Sciences, Kinki University Faculty of Pharmaceutical Sciences, Kinki University Faculty of Pharmaceutical Sciences, Kinki University
3-Arylamino-2-dialkylaminomethyl-4, 4-dimethyl-2-buten-4-olides and their aza analogs were synthesized from 5, 5-dimethyltetronic acid and tetramic acid, and tested analgesic and antimicrobial activities.