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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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An efficient method for obtaining 2-substituted benzimidazoles from o-phenylenediamine and carboxylic acids using tin (II) oxide as a catalyst in almost quantitative yield was developed. The reaction proceeds in a molten phase without a solvent. It was also shown that the regenerated catalyst can be used at least twice without loss of activity.