反应详情

Potassium t-butoxide (3.82 g, 32.30 mmol) is added to a solution of 3-nitrobenzoyl chloride (5.00 g, 26.94 mmol) in anhydrous THF (70 mL) and stirred under nitrogen for 2 hrs. The reaction mixture is concentrated in vacuo and partitioned between DCM and water. After separating the phases, the aqueous layer is back-extracted with ethyl acetate. The organic layers are combined, dried over anhydrous magnesium sulfate, filtered and then concentrated in vacuo. The crude product is purified on flash grade silica gel using 0-5% gradient of ethyl acetate in n-hexane. Fractions containing the product are combined, concentrated in vacuo, and then dried under high vacuum to provide the title compound as an oil (3.82 g, 17.1 mmol). 1H NMR (300 MHz, CDCl3) δ=1.63 (s, 9H); 7.62 (t, J=7.9 Hz, 1H); 8.29-8.41 (m, 2H); 8.78-8.80 (m, 1H). MS (Cl): [M+H]+ =224.

1. concentrationThe reaction mixture is concentrated in vacuo
2. custompartitioned between DCM and water
3. customAfter separating the phases
4. extractionthe aqueous layer is back-extracted with ethyl acetate
5. dry with materialdried over anhydrous magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customThe crude product is purified on flash grade silica gel using 0-5% gradient of ethyl acetate in n-hexane
9. additionFractions containing the product
10. concentrationconcentrated in vacuo
11. customdried under high vacuum