- A facile one-pot synthesis of benzimidazoles from 2-nitroanilines by reductive cyclization
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A facile one-pot process to prepare benzimidazole derivatives is described. Reductive cyclization of a serial of 2-nitroanilines with orthoesters in the presence of Pd/C in methanol at room temperature, which is promoted by a catalytic amount of acetic acid, affords the corresponding benzimidazole derivatives in high yields.
- Liu, Zheng,Li, Haihong,Zhao, Qingjie,Shen, Jingshan
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scheme or table
p. 1907 - 1911
(2009/04/06)
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- Beta-agonists, methods for the preparation thereof and their use as pharmaceutical compositions
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The present invention relates to new beta-agonists of general formula (I) wherein the groups R1 to R4 have the meanings given in ths claims and specification, the tautomers, racemates, enantiomers, diastereomers, solvates, hydrates,
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Page/Page column 16
(2010/11/27)
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