A one-pot four-component reaction of an aliphatic or aromatic amine, diketene, an aromatic aldehyde and 1,3-diphenyl-1H-pyrazol-5-amine in the presence of p-toluenesulfonic acid as a catalyst has been developed. In this reaction, a new class of fully substituted pyrazolo[3,4-b]pyridine-5-carboxamide derivatives is produced under mild reaction conditions and in good yields at ambient temperature. (C) 2009 Published by Elsevier Ltd.
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Islamic Azad Univ, Yadegar E Imam Khomeini RAH Shahre Rey Branch, Dept Chem, Tehran, IranIslamic Azad Univ, Yadegar E Imam Khomeini RAH Shahre Rey Branch, Dept Chem, Tehran, Iran
Shahvelayati, Ashraf S.
Ashouri, Akram
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Univ Kurdistan, Fac Sci, Dept Chem, Sanandaj, IranIslamic Azad Univ, Yadegar E Imam Khomeini RAH Shahre Rey Branch, Dept Chem, Tehran, Iran
Ashouri, Akram
Delbari, Akram S.
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Islamic Azad Univ, Islamshahr Branch, Coll Sci, Dept Chem, Tehran, IranIslamic Azad Univ, Yadegar E Imam Khomeini RAH Shahre Rey Branch, Dept Chem, Tehran, Iran
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Hebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Peoples R ChinaHebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Peoples R China
Guo, Rui-Yun
An, Zhi-Min
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Hebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Peoples R ChinaHebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Peoples R China
An, Zhi-Min
Mo, Li-Ping
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Hebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Peoples R ChinaHebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Peoples R China
Mo, Li-Ping
Yang, Shu-Tao
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Hebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Peoples R ChinaHebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Peoples R China
Yang, Shu-Tao
Liu, Hong-Xia
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Hebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Peoples R ChinaHebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Peoples R China
Liu, Hong-Xia
Wang, Shu-Xia
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Hebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Peoples R ChinaHebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Peoples R China
Wang, Shu-Xia
Zhang, Zhan-Hui
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Hebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Peoples R ChinaHebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Peoples R China