The synthesis of 1‐methyl‐ and 1‐benzyl‐3,5‐dimethoxy‐4‐halogeno‐1H‐pyrazoles is described. Moreover, detailed nmr spectroscopic studies with the title compounds are presented. The highly shielded pyrazole C‐4 atom in the corresponding 4‐iodo congeners was found to have a 13C‐chemical shift of only −27 ppm.
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Hölzer et al. (1995) studied this question.
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