Synthesis method of 4,4'-bi-1,3-dioxolane-2,2'-dione

摘要

The synthesis method of 4,4'-bi-1,3-dioxolane-2,2'-dione (4,4'-BI-1,3-DIOXOLANE-2,2'-DIONE) It is a technical field in which imidazole and tetrahydrofuran are put into the reactor in an argon gas atmosphere and cooled to -5~5℃, and then phosgene starts dropping. After dropping is completed in 0.5-1h, the dropping is completed at a temperature of -8~-15℃. The mixture was dropped into a solution of tetrahydrofuran containing erythritol, and the drop was completed at 1-1.5 h. The mixture was kept warm for 0.5-2 h, and the solvent was removed by vacuum to obtain a residue. The residue was dissolved in methylene chloride, washed with cold water, dried, and concentrated to 4,4'-bi-1,3-dioxolane-2,2'-dione (4,4'-BI-1,3-DIOXOLANE). -2,2'-DIONE) 4,4'-bi-1,3-dioxolane-2,2'-DIONE (4,4'-BI-1) obtained by obtaining a crude product and refining the crude product ,3-DIOXOLANE-2,2'-DIONE) is obtained. The raw material used in the present invention is inexpensive and easily obtained, and the synthesis method is simple, so it is easy to operate, low energy consumption, short reaction time, soft and stable reaction conditions, and high product yield, and can reach 94% or more.