| 摘要 |
NEW MATERIAL:A bispyrrolopyrazine compound of formula I: (R is H or methyl group; X is carbocyclic or heterocyclic aromatic diamine residue). EXAMPLE:A compound of formula II. USE:Printing ink and coating materials, and coloring rubbers and synthetic resins. PROCESS:A pyrrolopyrazine of formula III: (R1 is lower alkoxy group) is reacted with a diamine of the formula H2N-X-NH2 in an organic solvent to give the objective compound of formula I.
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