Photochromic compound and preparation method and application thereof
A photochromic and compound technology, applied in chemical instruments and methods, color-changing fluorescent materials, luminescent materials, etc., can solve the problems of reducing the effect of photochromic fluorescent switches, achieve high yield, simple preparation method, and easy industrialization Effect
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[0058] Example 1 Synthesis of Compound A1
[0059] synthetic route
[0060]
[0061] (a): Synthesis of compound 2 (9-anthracene borate pinacol ester)
[0062] Take 9-bromoanthracene (1.7g, 6.6mmol), pinacol diborate (2g, 7.9mmol) and dissolve in 1,4-dioxane (20mL), add anhydrous potassium acetate (1.9g, 19.8 mmol) and [1,1'-bis(diphenylphosphino)ferrocene]palladium dichloride (0.6g, 0.7mmol), added to the above system, heated to reflux at 100°C for 2h, TLC (thin layer chromatography ) Follow up and monitor the reaction to completion. Suction filtration, rotary evaporation to remove 1,4-dioxane, wash with saturated brine, extract three times with dichloromethane, combine the organic phases, dry with anhydrous sodium sulfate, spin dry, and separate by column chromatography (eluent is petroleum Ether: ethyl acetate = 100:1) to obtain a light yellow powder, namely compound 2 (1.8 g, yield 90%).
[0063] (b): Synthesis of compound 3 (5-(9-anthryl)indoline)
[0064] Take compound 2 (1.0g,...
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[0076] Example 2 Synthesis of Compound A2
[0077] synthetic route
[0078]
[0079] (a): Synthesis of compound 7 (N-butyl-1,8-naphthalimide boronic acid pinacol ester)
[0080] Take 4-bromo-N-ethyl-1,8-naphthimide (2.2g, 6.6mmol), pinacol diborate (2g, 7.9mmol) and dissolve in 1,4-dioxane (20mL ), add anhydrous potassium acetate (1.9g, 19.8mmol) and [1,1'-bis(diphenylphosphino)ferrocene]palladium dichloride (0.6g, 0.7mmol) to the above system After heating at 100°C under reflux for 2h, TLC (Thin Layer Chromatography) tracked and monitored the reaction to completion. Suction filtration, rotary evaporation to remove 1,4-dioxane, wash with saturated brine, extract three times with dichloromethane, combine the organic phases, dry with anhydrous sodium sulfate, spin dry, and separate by column chromatography (eluent is petroleum Ether: ethyl acetate = 100:1) to obtain a light yellow powder, namely compound 7 (2.1 g, yield 85%).
[0081] (b): Synthesis of compound 8 (5-(N-n-butyl-1,8-na...
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