Synthesis of Bis(7-dimethylamino-1-indolizinyl)methane Derivatives and Their Oxidation: As an Oxidative Chromogenic Reagent in Clinical Analysis
作者:Yoshinori Tominaga、Sachiko Itonaga、Tetsuya Kouno、Yasuhiro Shigemitsu
DOI:10.3987/com-01-9260
日期:——
Acid-catalyzed condensation of 7-dimethylaminoindolizines with aldehydes led to substituted bis(7-dimethylaminoindolizin-1-yl)methanes (3a-i) which were easily converted into substituted bis(7-dimethylaminoindolizin-1-yl)methyl cations (4a-i) by oxidation with DDQ. These triaryl cation dyes were converted to the new heterocyclic ring system, 12-dimethylamino-6,8-bis(ethoxycarbonyl)-2H-thiopyrano[3,2-a:5,6-a']diindolizine-2-N,N-dimethyliminium perchlorates (5a, b), under reflux conditions in ethanol.