| abstract |
NEW MATERIAL:A compound of formula I (R 1 , R 2 are H, alkyl, tetrahydrofurfuryl, phenyl, benzyl or they may bind with each other to form a ring; R 3 , R 6 are H, Cl, F alkyl, alkoxy; R 4 , R 5 are H, Cl, F alkyl, alkoxy, phenyl, benzyl, amino; R 7 is alkyl, phenyl, benzyl; X is H, Cl, F, nitro, alkyl; n is 1W4). n EXAMPLE: 2-(2-Chlorophenyl)-amino-6-N, N-dibutylamino-9-(2-methoxy-carbonyl)- phenylxanthene. n USE: An image-forming agent. n PREPARATION: The reaction of a fluorane compound of formula II with an alkyl halide is followed by esterification, then the product is reduced with a reducing agent such as sodium borohydride to give the compound of formula I. n COPYRIGHT: (C)1986,JPO&Japio |