| 摘要 |
N-(substituted phenyl)-N'-methyl-N'-(2-nitrophenyl thio) urea deriv. (I; X = halogen, lower alkyl, lower alkoxy, nitro, trifluoromethyl; n = 1,2,3), useful as herbicide, were prepd. by reaction of compd. (II) and compd. (III). Thus, N-(4-chlorophenyl)-N'-methylurea 4.1g was dissolved in dimethyl formamide 20 ml and pyridine 5 ml and 2-nitrophenylsulfenylchloride 4.17 g was added. The mixt. was left for one night, poured in ice water, filtered, washed with water, dried and then recrystallized to give N-(4-chlorophenyl)-N'-methyl-N'-(2-nitrophenylthio) urea 4.3 g.
|
