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1997 / ȣ: V.9,no.1,Feb |
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1,4-Diketopyrrolo-(3,4c)pyrrole ȷ ռ ü ռ |
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Synthesis of weather fast 1,4-Diketo-pyrrolo(3,4c)-pyrrole and its derivatives |
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Song, Hanchul (Dept of dyeing and finishing, Kyungpook National University, Taegu, Korea) Lee, Soojong (Dept of dyeing and finishing, Kyungpook National University, Taegu, Korea) |
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Song, Hanchul (Dept of dyeing and finishing, Kyungpook National University, Taegu, Korea) Lee, Soojong (Dept of dyeing and finishing, Kyungpook National University, Taegu, Korea) |
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Song, Hanchul (Dept of dyeing and finishing, Kyungpook National University, Taegu, Korea) Lee, Soojo |
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Song, Hanchul (Dept of dyeing and finishing, Kyungpook National University, Taegu, Korea) Lee, Soojo |
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44 ~ 49 : 6 |
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Korean |
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Recent investigation and developments of A. Iqbal on diketo-pyrrolo-pyrrole (DPP) pigments has prompted us to synthesize and close observation of a few properties of these molecules. Described are synthesis, via 1-phenyl-2-ethoxycarbonyl-5-pyrrolinone intermediate, of asymmetric derivatives such as 1,4-Diketo-3-(4-chlorophenyl)-6-phenyl-pyrrolo-(3,4c)-pyrrole (4), 1,4-Diketo-3-(4-bromophenyl)-6-phenybpyrrolo-(3,4c)-pyrrole (5), 1,4-Diketo-3-(3-cyanophenyl)-6-phenyl-pyrrolo-(3,4c)-pyrrole (6), 1,4-Diketo-3-(4-cyanophenyl)-6-phenyl-pyrrolo-(3,4c)-pyrrole (7), 1,4-Diketo-3-(4-pyridyl)-6-phenyt-pyrrolo-(3,4c)-pyrrole (8), 1,4-Diketo-3-(3-pyridyl)-6-phenyl-pyrrolo-(3,4c)-pyrrole (9), 1,4-Diketo-3-(2-pyridyl)-6-phenyl-pyrrolo-(3,4c)-pyrrole (10), 1,4-Diketo-3-(-naphthyl)-6-phenyl-pyrrolo-(3,4c)-pyrrole (11), and UV-Vis absorption spectrum of the above compounds. Results from calculation of their absorption maxima using PISYSTEM are also described. |
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