Chromogenic composition, chromogenic curable composition, lithographic printing plate precursor, platemaking method, and chromogenic compound
A lithographic printing plate and composition technology, applied in the field of color-developing compositions, can solve the problems of insufficient visibility, high color-developing properties, etc.
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[0375] Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to these Examples. In addition, in a polymer compound, unless otherwise specified, the molecular weight is a mass average molar mass (Mw), and the ratio of a repeating unit is a molar percentage.
[0376] I. The synthetic method of specific compound of the present invention
[0377] I-1. The synthetic method of intermediate (1)
[0378] [chem 23]
[0379]
[0380] COCl at room temperature for 30 min 2 (20 mass % toluene solution, 69.3g [140mmol]) and the solution of toluene 100g were added dropwise the solution of N-oxide (1) (8.25g [65mmol] and toluene 20g. After the dropwise addition, stirred for 30 minutes, and the resulting The precipitate was washed with toluene and then filtered to obtain 10.6 g [55.9 mmol] of intermediate (1). The yield was 86%.
[0381] The structure of the obtained intermediate 1 was identified by NMR. The identification results are sho...
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