Switch type acidichromism cyanostilbene compound as well as preparation method and application thereof

• Main Authors: WEN GUILIN, ZENG CHONGYANG, HU YUNHU, XU MAI, CHEN KAI, ZHANG ENSHEN, SON MI YOUNG
• Format: Patent
• Language: Chinese; English
• Published: 01.03.2024
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FILLING PASTES; INKS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC CHEMISTRY; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; SEMICONDUCTOR DEVICES; USE OF MATERIALS THEREFOR; WOODSTAINS

The invention relates to a switch-type acid-induced discoloration cyano-stilbene compound and a preparation method thereof, and belongs to the field of preparation of cyano-stilbene compounds, the cyano-stilbene compound is orange solid powder, and the preparation method comprises the following steps: adding 4-(dimethylamino) isophthalaldehyde and absolute ethyl alcohol into a 250mL round-bottom flask, and stirring at a constant temperature; then heating to fully dissolve the 4-(dimethylamino) isophthalaldehyde; 4-cyanophenylacetonitrile is added into the solution, after the 4-cyanophenylacetonitrile is fully dissolved, a saturated potassium carbonate solution is added for catalysis, a reflux reaction is conducted for 1.5-2 h at the temperature of 75-80 DEG C, and then the reaction is tracked through a thin layer chromatography; according to the method, raw materials are easy to obtain, conditions are mild, synthesis is rapid, the method is green and environmentally friendly, sample loss caused by extraction