Studies on the reaction of o-benzoquinon
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Dipl.-Chem. F. Pätzold; Prof. Dr. H.-J. Niclas; Dr. E. Gründemann
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Article
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1990
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John Wiley and Sons
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English
⚖ 293 KB
## Abstract An improved method for the preparation of the title compounds 4 is described. Thus, 1‐hydroxybenzimidazole 3‐oxides are obtained in high yields by the reaction of o‐benzoquinone dioxime 1 with aromatic and heteroaromatic substituted aldehydes 2 in the presence of an excess of strong aci