反应详情

温度

-30 °C

9.50 g of 3-methyl-4-nitrobenzoic acid (52.5 mM) were dissolved in 400 ml of THF and 53.1 g of triethylamine (525.0 mM). The solution was cooled to −30° C. and 6.01 g of methansulfochloride (52.5 mM) were added. The mixture was stirred for 1 h at this temperature, then a solution of 8.21 g of 4-pentylphenol (50.0 mM) in 20 ml of THF was added, followed by 100 mg of DMAP. The reaction mixture was stirred for 1 h at −30° C. and was allowed to warm to room temperature while stirred overnight. The next day, the mixture was filtered through a pad of celite filter aid, evaporated to dryness. The residue was flash chromatographed on silica gel using cyclohexane/ethyl acetate: 1/1 as eluent to afford 4-pentylphenyl 3-methyl-4-nitrobenzoate as a yellow oil. Yield: 16.2 g (49.5 mM, 99%).

1. addition6.01 g of methansulfochloride (52.5 mM) were added
2. stirringThe reaction mixture was stirred for 1 h at −30° C.
3. temperatureto warm to room temperature
4. stirringwhile stirred overnight
5. filtrationThe next day, the mixture was filtered through a pad of celite
6. filtrationfilter aid
7. customevaporated to dryness
8. customchromatographed on silica gel