| 摘要 |
3-Phenylpyrrole(I; Xn = 2- Cl, 3-Cl, 2,3-Cl2, 3-CF3; R = H, acetyl; if R is H, Xn is 2,3-Cl2), useful fungicide, was prepd. by de-carboxylating compds. II in inactive solvent such as quinoline and dimethylaniline at 120-220≦̸C or in CH2SO4 at 100-130≦̸C in the presence of CuO or CuCl2 or CuSO4 to give I', and by acetylating I' with acetylimidazole at 90-120≦̸C to give I", which is one of compds. I. Thus, 4-chloro-3-(2,3-dichlorophe-yl)pyrrole was prepd. by using 50 % NaOH 14 g, diethyloxalate 21.3 g, ethanol 0.54 ml and 2,3-dichloroacetophenone 30 g as starting materials.
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