Dougherty & Troxell
Process for the preparation of 1,1'-dialkyl-4,4'-bipyridinium salt compounds
 This invention relates to an improved method of preparing 1,1'-dialkyl-4,4'-bipyridinium salt compounds which is free of cyanic ion and contains low amount of inorganic salts. 
Kuo Ching Chemical Co., Ltd.
C
C07D
inventional
Ting-Kai Sheau-Cheau Chiu-Peng Chi-Yung
Huang Lin Tsou Shen