| 摘要 |
Novel bis-(indolyl)ethylenes, process for their production and record systems utilizing such bis-(indolyl)ethylene chromogens are described. Bis-(indolyl)ethylenes of the following general formula are prepared: <IMAGE> (I) wherein each L1 and L2 is the same or different and is each independently selected from indole moieties (J1) through (J4) (L1 need not be the same as L2), <IMAGE> (J1) <IMAGE> (J2) <IMAGE> (J3) <IMAGE> (J4) wherein in (J1) through (J4) above, each of R5, R6, R13, R14, R21, R22, R29 and R30 need not be the same and is each independently selected from hydrogen, alkyl (C1-C8), cycloalkyl, alkylaroxy, alkylalkoxy, and substituted or unsubstituted aryl, such as phenyl, naphthyl, or heterocyclyl. Each of R1, R2, R3, R4, R7, R8, R9, R10, R11, R12, R15, R16, R17, R18, R19, R20, R23, R24, R25, Rphu 26, R27, and R28 need not be the same and is each independently selected from hydrogen, alkyl (C1-C8), cycloalkyl, substituted or unsubstituted aryl, halogen, alkoxy (C1-C8), aroxy, cycloalkoxy, dialkylamino including symmetrical and unsymmetrical alkyl groups with one to eight carbon, alkylcycloalkylamino, dicycloalkylamino, <IMAGE> wherein Z is hydrogen, alkyl (C1-C8), substituted or unsubstituted aryl, aralkyl, aroxyalkyl, alkoxyalkyl or halogen.
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