反应详情

温度

-40 °C

The 4-bromo-2-(1,1-dimethyldecyl) anisole (15.72 g, 44.2 mmoles) obtained in Example 11(a), above, is dissolved in THF (50 ml). This solution is slowly added to magnesium (1.18 g, 48.7 mmoles) and an iodine crystal, while being maintained at reflux by heating. Once the addition is complete, the reaction mixture is maintained at reflux for 30 minutes and then cooled to -40° C. 300 ml of THF are added and a stream of CO2 is passed therethrough for 2 hours. The reaction mixture is then poured into a solution of HCl (4N, 300 ml) and the product is extracted with ether (3×300 ml). The organic phase is washed with water until neutral, dried on MgSO4, and the solvents are evaporated. The residue is pulverized in isooctane to produce 7.25 g (51% yield) of 3-(1,1-dimethyldecyl)-4-methoxy benzoic acid which melts at 112° C.

1. temperatureat reflux
2. temperatureby heating
3. additionOnce the addition
4. temperaturethe reaction mixture is maintained
5. temperatureat reflux for 30 minutes
6. extractionthe product is extracted with ether (3×300 ml)
7. washThe organic phase is washed with water until neutral,
8. customdried on MgSO4
9. customthe solvents are evaporated