| abstract |
The 3-substs. phenyl-3-substd-amino-phthalides (I) of formula (inwhich independently R1 and R2 are lower alkyl opt. with a Cl, CN or 1-4C alkoxy, substit. benzyl opt. witha di-1-4C alkylamino substit. or phenyl opt. with a 1-4C alkoxy substit. R3 is Cl, 1-4C alkyl or 1-4C alkoxy R4 is H or 1-4C (hydroxy)alkyl; R5 is 1-6C alkyl, cyclohexyl, benzyl, phenyl, opt. with a 1-4C alkyl, HOCH2CH2, Cl or nitroacetyl substit. naphthyl opt. with a 1-4C alkoxy substit. carbazlyl, benzothiazolyl, opt. with a 1-4C alkoxy substit. or benzotrazolyl; R and R5 and the N atom can form a piperidino, morpholino, N-1-4C alkyl-piperazino or pyrrolyl gp; X is H, Cl or a di-1-4C alkylamino gp; m = 1-4; if R5 is Ph, R3 is not H) are used as colour formers for thermographic, hectographic and pressure-sensitive recording matls. |