反应详情

温度

100 °C

A solution of dimethyl isophthalate (12 g, 61.85 mmole) and acetone (5 mL, 68 mmole) in a mixture of toluene/dimethoyethane (90 mL/30 mL) was added to a suspension of NaH 60% (2.97 g, 74.23 mmole) in dry toluene (30 mL) under argon. The mixture was heated at 100° C. for 4 hours. The reaction mixture was cooled to rt and 25 mL of water were added. The mixture was poured into water (250 mL) and the pH was adjusted to 3-4 with HCl 2N. The aqueous mixture was extracted with ethyl acetate (2×250 mL), washed with brine, dried over sodium sulphate and evaporated to afford a yellow solid which was purified by column cromatography (n-Hex/EtOAc 9:1 to 8:2) to afford the title compound (1.78 g, 11% yield) as a yellow solid.

1. temperatureThe reaction mixture was cooled to rt
2. extractionThe aqueous mixture was extracted with ethyl acetate (2×250 mL)
3. washwashed with brine
4. dry with materialdried over sodium sulphate
5. customevaporated
6. customto afford a yellow solid which
7. customwas purified by column cromatography (n-Hex/EtOAc 9:1 to 8:2)