Journal
TETRAHEDRON
Volume 68, Issue 11, Pages 2509-2512Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2012.01.056
Keywords
Telmisartan; Receptor antagonist; Benzimidazole; Cyclocondensation; Synthesis
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Funding
- National Key Project for Basic Research [2010CB126102]
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A novel and cost-efficient strategy for synthesis of an antihypertensive drug telmisartan, a substituted bis-benzimidazole derivative, is described. The key strategy is the construction of bis-benzimidazole 4 by reductive cyclization of o-nitroanilines 11 with butyl aldehyde and cyclocondensation of aromatic aldehydes 9 with o-phenylenediamine, then N-alkylation is allowed to give the target compound telmisartan after hydrolysis. The simple operation and workup procedure, along with the low production costs, make it suitable for industrial production and will benefits those with cardiovascular disease. (C) 2012 Elsevier Ltd. All rights reserved.
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