A ligand-free Pd(II)-catalyzed synthesis of quinoxalin-2(1H)-ones has been developed. Pd(TFA)(2) can induce ethyl 2-(N-arylcarbamoyl)-2-chloroiminoacetates to undergo cyclization to afford quinoxalin-2(1H)-one products in high yields in the presence of Na2CO3. This catalytic system is also effective to convert alpha-aryl-alpha-chloroimino-N-arylamides to the corresponding quinoxalin-2(1H)-one products via tandem N-Cl cleavage and N-arylation in moderate yields. The reaction described herein constitutes simple and effective approach towards quinoxalin-2(1H)-one derivatives. (C) 2020 Elsevier Ltd. All rights reserved.
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Nanjing Univ Chinese Med, Coll Pharm, Jiangsu Collaborat Innovat Ctr Chinese Med Resourc, Nanjing 210023, Peoples R ChinaNanjing Univ Chinese Med, Coll Pharm, Jiangsu Collaborat Innovat Ctr Chinese Med Resourc, Nanjing 210023, Peoples R China
Qiu, Zhihong
Huang, Xianting
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Nanjing Univ Chinese Med, Coll Pharm, Jiangsu Collaborat Innovat Ctr Chinese Med Resourc, Nanjing 210023, Peoples R ChinaNanjing Univ Chinese Med, Coll Pharm, Jiangsu Collaborat Innovat Ctr Chinese Med Resourc, Nanjing 210023, Peoples R China
Huang, Xianting
Wu, Jintao
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Nanjing Univ Chinese Med, Coll Pharm, Jiangsu Collaborat Innovat Ctr Chinese Med Resourc, Nanjing 210023, Peoples R ChinaNanjing Univ Chinese Med, Coll Pharm, Jiangsu Collaborat Innovat Ctr Chinese Med Resourc, Nanjing 210023, Peoples R China
Wu, Jintao
Liu, Zhong-Quan
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Nanjing Univ Chinese Med, Coll Pharm, Jiangsu Collaborat Innovat Ctr Chinese Med Resourc, Nanjing 210023, Peoples R ChinaNanjing Univ Chinese Med, Coll Pharm, Jiangsu Collaborat Innovat Ctr Chinese Med Resourc, Nanjing 210023, Peoples R China
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Nanjing Univ Chinese Med, Coll Pharm, Jiangsu Collaborat Innovat Ctr Chinese Med Resourc, Nanjing 210023, Peoples R ChinaNanjing Univ Chinese Med, Coll Pharm, Jiangsu Collaborat Innovat Ctr Chinese Med Resourc, Nanjing 210023, Peoples R China
Qiu, Zhihong
Huang, Xianting
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Nanjing Univ Chinese Med, Coll Pharm, Jiangsu Collaborat Innovat Ctr Chinese Med Resourc, Nanjing 210023, Peoples R ChinaNanjing Univ Chinese Med, Coll Pharm, Jiangsu Collaborat Innovat Ctr Chinese Med Resourc, Nanjing 210023, Peoples R China
Huang, Xianting
Wu, Jintao
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Nanjing Univ Chinese Med, Coll Pharm, Jiangsu Collaborat Innovat Ctr Chinese Med Resourc, Nanjing 210023, Peoples R ChinaNanjing Univ Chinese Med, Coll Pharm, Jiangsu Collaborat Innovat Ctr Chinese Med Resourc, Nanjing 210023, Peoples R China
Wu, Jintao
Liu, Zhong-Quan
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Nanjing Univ Chinese Med, Coll Pharm, Jiangsu Collaborat Innovat Ctr Chinese Med Resourc, Nanjing 210023, Peoples R ChinaNanjing Univ Chinese Med, Coll Pharm, Jiangsu Collaborat Innovat Ctr Chinese Med Resourc, Nanjing 210023, Peoples R China