Preparation method of L-proline-loaded temperature/magnetism double responsive functional hybrid microspheres
A technology for hybridizing microspheres and proline, which can be used in the preparation of organic compounds, organic chemistry methods, chemical instruments and methods, etc., and can solve problems such as low catalyst recovery rate
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[0030] Step 1. Add 9 ml of trifluoroacetic acid CF to the round bottom flask 3 CO 2 H, placed in an ice-water bath, 3.81 g of dry trans-4-hydroxy-L-proline C 5 h 9 NO 3 Slowly add to the round bottom flask, the dropping time is 5-10 minutes, stir during the dropping, and continue to stir for 5 minutes after all the dropping, then remove the insoluble matter, keep the remaining solution in the round bottom flask, then add 0.3 mL of trifluoromethanesulfonate CF 3 SO 3 H, after standing for 5 minutes, continue to add 4.6 ml of acryloyl chloride C 3 h 3 OCl, remove the flask from the ice-water bath, and exotherm the solution in the round-bottomed flask with stirring at room temperature. After 20 min, add 1 mL of trifluoroacetic acid CF 3 SO 3 H, to obtain a colorless clear liquid, continue to stir at room temperature for 1 hour and 40 minutes, cool in an ice-water bath, then slowly add 54 ml of a mixed solution of ethyl acetate and petroleum ether with a volume ratio of 1:...
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