反应详情

2-Cyclohexylthio-5-nitropyridine (13.4 grams) was added to a suspension of 50 grams of ammonium chloride and 20 grams of powdered iron in a mixture of 220 ml. of ethyl acetate and 30 ml. of water. The reaction mixture was refluxed for 6 hours. TLC indicated some starting material remained. Additional powdered iron (10 grams) was added and the reaction mixture refluxed for another 2 hours. TLC indicated no starting material remaining. The reaction mixture was filtered, taken up in chloroform, washed with water, dried, and evaporated. The main product residue was crystallized from ethyl acetate-hexanes, 8.4 grams of tan crystals; a second crop was crystalled from chloroform-hexanes with charcoal, 0.8 gram. The second crop was analyzed as follows:

1. temperatureThe reaction mixture was refluxed for 6 hours
2. temperaturethe reaction mixture refluxed for another 2 hours
3. filtrationThe reaction mixture was filtered
4. washwashed with water
5. customdried
6. customevaporated
7. customThe main product residue was crystallized from ethyl acetate-hexanes, 8.4 grams of tan crystals