反应详情

温度

150 °C

To a solution of α,α′-Bisbromo-m-xylene (7.75 g, 29.38 mmol) in DMF (10 mL) was added diethyl methylphosphonite (2.0 g, 14.69 mmol) via syringe. The mixture was heated to 150° C. for 2 minutes in a microwave. The reaction mixture was poured into water and product extracted with ethyl acetate (3×25 mL). The combined organics were washed with water (2×50 mL) and brine (50 mL), and dried over Na2SO4. Reduced volume in vacuo and purified product by flash column eluting 20-100% ethyl acetate in hexanes to give 1.89 g mg (44%) 65 as a colorless oil. 1H NMR (300 MHz, CDCl3) δ 1.24 (t, 3H), 1.33 (d, 3H), 3.08 (d, 2H), 3.97 (dt, 2H), 4.44 (s, 2H), 7.25 (m, 4H). LCMS: m/z for C11H16BrO2P++H observed 291.0 and 293.0 at 2.09 minutes of a 3.5 minute run, gradient 5-95% CH3CN in H2O.

1. extractionextracted with ethyl acetate (3×25 mL)
2. washThe combined organics were washed with water (2×50 mL) and brine (50 mL)
3. dry with materialdried over Na2SO4
4. custompurified product by flash column
5. washeluting 20-100% ethyl acetate in hexanes