反应详情

A solution was prepared by dissolving 18.5 g (0.26 mol) of sodium nitrite, of a purity of 97%, in 30 ml of water. This solution was added dropwise to a solution composed of 51.3 g (0.25 mol) of N,N-dibutylaniline, 200 g of water and 105 ml of conc HCl (35 to 38%) at a temperature between 10° and 20° C. for one-half hour. After stirring the solution obtained for one hour, the solution was neutralized to pH 8 with a 15% aqueous solution of sodium hydroxide. The crystals obtained were filtered, washed sufficiently on filter paper and thereafter dried with hot-air at 50° C. for 48 hours. 28.1 g of N,N-dibutyl-p-nitrosoaniline with a melting point of 122°~124° C. was obtained. The yield was 48.0%.

1. customA solution was prepared
2. additionThis solution was added dropwise to a solution
3. customobtained for one hour
4. customThe crystals obtained
5. filtrationwere filtered
6. washwashed sufficiently
7. filtrationon filter paper
8. customdried with hot-air at 50° C. for 48 hours