Photochromic thiophenedicolic acid water-soluble symmetrical perfluorocyclopentene compound and its preparation method and application
A technology of perfluorocyclopentene and thiophenedicolic acid, applied in the direction of steroidal compounds, chemical instruments and methods, color-changing fluorescent materials, etc., can solve the problems of increasing water solubility, achieve low cost, broad application prospects, and application prospects big effect
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[0022] The name is: 1-{[2-Methyl-5-(methyleneazide-cholic acid)-3-thienyl]}-2-{[2-methyl-5-(methyleneazide- Cholic acid)-3-thienyl]}perfluorocyclopentene ( 1o ), the synthesis scheme of this perfluorocyclopentene diarylethylene photochromic compound is shown in Scheme1:
[0023] Scheme1:
[0024] The specific synthesis steps are as follows:
[0025] 1. 3-Bromo-2-methyl-5-aldehyde thiophene (2):
[0026] Under ice bath conditions, dissolve 2-methyl-5-aldehyde thiophene (1) (25.2g, 200mmol) in 200mL acetic acid, place it in a 500mL single-neck flask, stir, and then add 11mL liquid bromine and 60mL glacial acetic acid. Place in a constant pressure funnel and slowly add dropwise. The mixture of liquid bromine and glacial acetic acid is dripped in 0.5h. Continue the ice bath reaction for 8h, add water liquid, neutralize the water phase with NaOH, and then use dichloromethane Extract and combine the organic phases with saturated Na 2 CO 3 Wash sequentially with water solution, anhydrous ...
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