Application method of catalysts capable of synthesizing cyclic carbonate under normal temperature and atmosphere
A cyclic carbonate, application method technology, applied in catalytic reactions, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems of low catalyst activity and high cost, and achieve high activity. , low price, mild reaction conditions
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Embodiment 1
[0025]In a 50mL stainless steel autoclave, add 9.25g (0.1mol) of epichlorohydrin, 1.752g (0.005mol) of N-methyl-N-dodecylmorpholine ammonium bromide (the preparation refers to N-methyl -The preparation of N-hexadecylmorpholine ammonium bromide, only dodecyl bromide replaces hexadecane bromide) as the main catalyst, 0.84g (0.005mol) cobalt acetate is the cocatalyst, and the airtight reaction kettle is continued Introduce carbon dioxide, keep the pressure in the kettle at 0.1MPa, slowly raise the temperature to 35°C, react for 24 hours, cool to room temperature, slowly release the pressure, and distill the resulting liquid under reduced pressure to obtain the product 4-chloromethyl-[1, 3] The yield of dioxolan-2-one cyclic carbonate was detected by gas chromatography spectrometry and NMR, and the yield was 98.2%. The NMR data are as follows: 1 HNMR (CDCl 3 , 300MHz): δ (ppm): 3.78 (dd, J = 3.6, 12.3Hz, 1H); 3.86 (dd, J = 4.9, 12.3Hz, 1H); 4.44 (dd, J = 5.7, 8.8Hz, 1H) ; 4.64 ...
Embodiment 2
[0027] With the reaction conditions and detection method in embodiment 1, change main catalyst used into 1.61g (0.005mol) N-methyl-N-decylmorpholine ammonium bromide (its preparation is with reference to N-methyl-N-decyl ammonium bromide) The preparation of hexaalkylmorpholine ammonium bromide, only decane bromide is replaced hexadecane bromide), cocatalyst changes zinc bromide 0.225g (0.001mol), obtains 4-chloromethyl-[1,3 ] Dioxolan-2-one with a yield of 75.4%.
Embodiment 3
[0029] With reaction conditions and detection method in embodiment 1, change main catalyst used into 0.306g (0.001mol) N-methyl-N-dodecylmorpholine ammonium chloride (its preparation is with reference to N-methyl-N- -The preparation of hexadecylmorpholine ammonium bromide, only dodecyl chloride is replaced hexadecane bromide), promotor changes magnesium sulfate 0.012g (0.0001mol), obtains 4-chloromethyl-[1 , 3] Dioxolan-2-one, the yield was 86.7%.
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