Research Article
Ferric Hydrogensulfate As a Reusable Heterogeneous Catalyst for the Synthesis of 5-Substituted-1H-Tetrazoles and Amides
Table 2
Preparation of 5-subsitituted-1H-tetrazoles in the presence of Fe(HSO4)3.
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(a) Isolated yields. (b) Recrystallized from CH2Cl2-n-hexane. ((c)–(f)) Yields in parentheses refer to reusability of the recovered catalyst in new runs. (g) Purified only with column chromatography using CH2Cl2-n-hexane. |