NEW MATERIAL:A compound shown by the formula I [R is 1W4C alkyl; X is H, or bromo; K is formula IIWformula V (R1 is H, chloro, methyl, acetylamino, etc.; R2 is H, chloro, methyl, methoxy, etc.; R3 and R4 are H, 1W4C alkyl, aryl, benzyl, cycanoethyl, etc., and R3 and R4 are not H at the same time; R5 is chloro, methyl, or ethyl; R6 is H, methyl, or phenyl; R7 is methyl, or 2W5C alkoxycarbonyl; R8 is H, 1W4C alkyl, etc.)].

EXAMPLE: A compound shown by the fomrula VI.

USE: Dyeing and printing hydrophobic fiber, especially polyester, triacetate fiber, etc. in purple, red, or yellow with improved fastness, light resistance, etc.

PREPARATION: An aniline derivative shown by the formula VI (e.g., 2,6-dicyano- 3-methyl-5-methoxycarbonylmethyl-aniline, etc.) is diazotized, and coupled with a coupling component shown by the formula KH.