Simple and Efficient Method for the Synthesis of Benzimidazole Derivatives using Monoammonium Salt of 12‐Tungstophosphoric Acid
作者:B. Y. Giri、B. L. A. Prabavathi Devi、K. N. Gangadhar、K. Vijaya Lakshmi、R. B. N. Prasad、N. Lingaiah、P. S. Sai Prasad
DOI:10.1080/00397910701410681
日期:2007.7
Abstract Benzimidazoles have been synthesized in very good yield from o‐phenylenediamine and aromatic aldehydes in the presence of monoammonium salt of 12‐tungstophosphoric acid [(NH4)H2PW12O40], an efficient heterogeneous catalyst. This catalyst has the advantages of simple workup procedure, water insolubility, and good activity with high yield for the synthesis of benzimidazole derivatives.
摘要 在 12-钨磷酸单铵盐 [(NH4)H2PW12O40](一种高效的多相催化剂)存在下,由邻苯二胺和芳香醛以非常好的收率合成了苯并咪唑。该催化剂具有后处理简单、不溶于水、合成苯并咪唑衍生物活性好、收率高等优点。