| abstract |
NEW MATERIAL:Diazaphenalene derivative of formula I [R 1 is H, halogen, OH, lower alkyl, aryl, -NR 7 R 8 , -COOR 7 , -COR 7 R 8 (R 7 , 8 are H, lower alkyl, etc.),; R 3 , 5 , 6 are H, halogen, -COOR 7 , etc,; R 4 is H, halogen, cyano, -NR 7 R 8 , etc.; Y is group IV, etc.]. n USE: Orange to reddish violet organic pigment. n PROCESS: A compound of formula II (R 1 ' is H, halogen, -NR 7 R 8 , etc.; R 2 ' is H, halogen, OH, lower alkyl, lower alkoxy, lower haloalkyl, etc.) is made to react with a carboxylic acid anhydirde of formula III (Z 1 is group Y, etc.) or its reactive derivative n COPYRIGHT: (C)1979,JPO&Japio |