Calix[4]arene containing coumarin structure and its synthesis method and use
A synthesis method and coumarin technology, applied in the new synthesis technology and application field of calix[4]arene, achieving the effect of high yield, mild reaction conditions and good phase transfer catalysis
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[0018] 1. Preparation process:
[0019] 1. Preparation of 2,8,14,20-tetrapropyl-5,11,17,23-tetraformyl-resorcinol calix[4]:
[0020] Add 30mL trifluoroacetic acid (TFA) in 250mL round bottom flask, add 10mmol 2,8,14,20-tetrapropyl-resorcinol calix [4] and 40mmol hexamethylenetetramine ( HMTA) mixture, heated to 85°C for 24h, then added 20mL of concentrated hydrochloric acid with a concentration of 1g / ml, and the mixture continued to react at 105°C for about 24h, and a large amount of yellow solid appeared in the system at this time. Suction filtration and recrystallization with methanol gave 2,8,14,20-tetrapropyl-5,11,17,23-tetraformyl-resorcinol calix[4] as a yellow solid with a yield of 65%.
[0021] Product identification 2,8,14,20-tetrapropyl-5,11,17,23-tetraformyl-resorcinol calix[4], yield: 65%, melting point: 294-296°C.
[0022] IR(KBr,cm -1 ): 3358(m), 2957(m), 2868(m), 1636(vs), 1463(s), 1379(m), 1241(m).;
[0023] 1 H-NMR (600MHz, CDCl 3 ):δ ppm ,0.9...
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