反应详情

Potassium hydroxide (6.15 g; 87%) was added to a stirred solution of thiophenol (10.0 g) in N,N-dimethylformamide (170 mL) at room temperature. When most of the potassium hydroxide appeared to have dissolved, 2,5-dichloronitrobenzene (17.4 g) was added, and the initially dark solution turned a bright yellow with some precipitate. The reaction was placed in an oil bath at 70° C. for three hours, and then evaporated in vacuo. The residue was partitioned between chloroform and 1 N NaOH and the layers were separated. The aqueous layer was extracted once more with chloroform. The chloroform solutions were combined, washed with 1 N NaOH, H2O, 1 N HCl, H2O and brine, dried over MgSO4, and evaporated in vacuo. The resulting oil was treated with cyclohexane, and the product crystallized. The crystalline product was collected by filtration, washed with hexane, and dried in vacuo at 56° C. to yield 13.73 g (57%) of yellow crystals. mp: 84°-86° C.

1. dissolutionto have dissolved
2. customevaporated in vacuo
3. customThe residue was partitioned between chloroform and 1 N NaOH
4. customthe layers were separated
5. extractionThe aqueous layer was extracted once more with chloroform
6. washwashed with 1 N NaOH, H2O, 1 N HCl, H2O and brine
7. dry with materialdried over MgSO4
8. customevaporated in vacuo
9. additionThe resulting oil was treated with cyclohexane
10. customthe product crystallized
11. filtrationThe crystalline product was collected by filtration
12. washwashed with hexane
13. customdried in vacuo at 56° C.