| 摘要 |
Herbicidal title compds. I; X = halogen; n = 1-3; R = H, lower alkoxycarbonyl) & their salts, were prepd. in 5 steps. For example, (1) 1-nitro-2,4-dichlorobenzene was reacted with benzylmercaptane to give benzyl-2-nitro-5-chlorophenylsulfate (II), (2) II was reacted with III(Xn = 2,4-dichloro) to give IV, (3) and (4) IV was reacted with H2O and Cl2 in the presence of CH3COOH to give V, (5) V was reacted with chloroethyl formate to give I(Xn = 2,4-dichloro; R = ethoxycarbonyl.
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