| 摘要 |
PCT No. PCT/EP95/04658 Sec. 371 Date Jun. 5, 1997 Sec. 102(e) Date Jun. 5, 1997 PCT Filed Nov. 25, 1995 PCT Pub. No. WO96/17893 PCT Pub. Date Jun. 13, 1996Benzopyran dyes of the formula <IMAGE> where n is 1 or 2, Xhu 1 is oxygen or imino, X2 is cyano or carbamoyl, R1 and R2 are independently of each other C1-C13-alkyl subject to the proviso that the sum total of the carbon atoms present in R1 and R2 shall be at least 10, and R3 is hydrogen, C1-C6-alkyl, C1-C6-alkoxy, halogen, cyano, nitro, carbamoyl, mono- or di(C1-C4-alkyl)carbamoyl, sulfamoyl or mono- or di(C1-C4-alkyl)sulfamoyl, are obtainable from novel iminocoumarin intermediates and useful for dyeing or printing synthetic materials. |
