小中大贴个文献的方法供参考
Step 2: A 100ml three-neck flask was charged with 50ml anhydrous benzene and 25.3g 2-chloro-1, 3, 2-dioxaphospholane (0.2mol), slowly purging oxygen into the solution. After about one-hour of purging oxygen, the mixture was heated to reflux and maintained for 5-6 hours. Then the reaction was cooled to room temperature, the solvent was removed, and the residue was distilled under reduced pressure to collect fraction at 90.deg.C/1mmHg, obtaining 12.3g 2-chloro-1,3,2-dioxaoxidophospholane in a yield of 43percent. 1H-NMR (CDCl3, 500M) δ: 4.64 (2H, m; a-CHCH-); 4.56 (2H, m, e-CHCH-).
