Polyether functionalized cyclodextrin-based biomass organic catalyst and preparation method thereof
An organic catalyst and cyclodextrin technology are applied in the field of cyclodextrin-based biomass organic catalysts and their preparation, and can solve the problems of ineffective utilization of molecules, low effective utilization rate, and destruction of the formation of hydrogen bond networks in CD crystalline regions.
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Embodiment 1
[0053] Catalyst [R 1 (EO) n IMR 2 -C 6 h 2 CD(OH) l ][Y] synthesis (R 1 =CH 3 , R 2 =H, n=16, l=20, Y=1 - )
[0054] The β-cyclodextrin derivative CD(OH) l -C 6 h 2 -W (l=20, W=I) and polyether functionalized organic base R 1 (EO) n IMR 2 (R 1 =CH 3 , R 2 =H, n=16) dissolved in the organic solvent N,N-dimethylformamide (DMF), CD(OH) l -C 6 h 2 -W(l=20, W=I) and R 1 (EO) n IMR 2 (R 1 =CH 3 , R 2 =H, n=16) at a molar ratio of 1:3, reacted at 90°C for 84h. After the reaction, cool to room temperature, add acetone, filter, wash the filter cake three times with acetone, then wash twice with dichloromethane, and vacuum dry to obtain a light yellow solid powder with a yield of 79.5%.
Embodiment 2
[0056] Catalyst [R 1 (EO) n IMR 2 -C 6 h 2 CD(OH) l ][Y] synthesis (R 1 = Ph, R 2 =H, n=16, l=20, Y=Br - )
[0057] The β-cyclodextrin derivative CD(OH) l -C 6 h 2 -W (l=20, W=Br) and polyether functionalized organic base R 1 (EO) n IMR 2 (R 1 = Ph, R 2 =H, n=16) dissolved in the organic solvent N,N-dimethylformamide (DMF), CD(OH) l -C 6 h 2 -W(l=20, W=Br) and R 1 (EO) n IMR 2 (R 1 = Ph, R 2 =H, n=16) at a molar ratio of 1:3, reacted at 90°C for 84h. After the reaction, cool to room temperature, add acetone, filter, wash the filter cake three times with acetone, then wash twice with dichloromethane, and vacuum dry to obtain a light yellow solid powder with a yield of 77.8%.
Embodiment 3
[0059] Catalyst [R 1 (EO) n IMR 2 -C 6 h 2 CD(OH) l ][Y] synthesis (R 1 =CH 3 , R 2 =H, n=16, l=20, Y=Cl - )
[0060] The β-cyclodextrin derivative CD(OH) l -C 6 h 2 -W (l=20, W=Cl) and polyether functionalized organic base R 1 (EO) n IMR 2 (R 1 =CH 3 , R 2 =H, n=16) dissolved in the organic solvent N,N-dimethylformamide (DMF), CD(OH) l -C 6 h 2 -W (l=20, W=Cl) and R 1 (EO) n IMR 2 (R 1 =CH 3 , R 2 =H, n=16) at a molar ratio of 1:5, reacted at 90°C for 84h. After the reaction, cool to room temperature, add acetone, filter, wash the filter cake three times with acetone, then wash twice with dichloromethane, and vacuum dry to obtain a light yellow solid powder with a yield of 75.5%.
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