反应详情

温度

0 °C

A solution of NaH (60% dispersion in mineral oil) (2.1 g, 53 mmol) in DMF (100 mL) in a 500 mL round bottom flask was cooled 0° C. A solution of ethyl 2,2-bis(4-chlorophenyl)acetate (5.47 g, 18 mmol) and MeI (3.3 mL, 53 mmol) in DMF (50 mL) was added dropwise over 15 minutes. The mixture was stirred at 0° C. for 15 minutes and then allowed to warm to room temperature and stirred for 20 hours. A mixture of products was observed by LC/MS. The solution was diluted with EtOAc (200 mL), and then washed with 10% HCl(aq) (200 mL), with deionized water (200 mL), and then with brine (100 mL). The organic layer was dried over MgSO4, concentrated, and dried in vacuo to give 10.11 g crude product which was purified by flash column chromatography (silica, 0-100%, hexane/EtOAc) to give 2,2-bis(4-chlorophenyl)propanoic acid (3.05 g).

1. temperatureto warm to room temperature
2. stirringstirred for 20 hours
3. additionA mixture of products
4. washwashed with 10% HCl(aq) (200 mL), with deionized water (200 mL)
5. dry with materialThe organic layer was dried over MgSO4
6. concentrationconcentrated
7. customdried in vacuo
8. customto give 10.11 g crude product which
9. customwas purified by flash column chromatography (silica, 0-100%, hexane/EtOAc)