Synthetic study of tetramethyljulolidine - a key intermediate toward the synthesis of the red dopant DCJTB for OLED applications

Abstract

The formation and characterization of a novel chiral sulfonic acid derivative obtained during the synthesis of 1,1,7,7-tetramethyljulolidine (TMJ), a key intermediate towards the red dopant 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljutolidyl-9-enyl)-4H-pyran (DCJTB) used for organic electroluminescent devices, upon bis-annulation of NN-bis(4-methyl-2-butenyl)aniline is described. (C) 2002 Elsevier Science Ltd. All rights reserved.