While elemental sulfur has been largely used as oxidant or sulfurating agent, its role as a catalyst has not been developed. We report here its catalytic activity in the oxidative condensation of o-phenylenediamines with acetophenones in DMSO to provide quinoxalines. The method was also extended to alpha-tetralones, propiophenones (R = Me) as well as higher homologues (R = Et, n-Pr) in place of acetophenones, leading to a wide range of naphthoquinoxalines and 3-substituted 2-arylquinoxalines.
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S China Normal Univ, Sch Chem & Environm, Guangzhou 510006, Guangdong, Peoples R ChinaS China Normal Univ, Sch Chem & Environm, Guangzhou 510006, Guangdong, Peoples R China
Qi, Ji
Huang, Liangbin
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S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R ChinaS China Normal Univ, Sch Chem & Environm, Guangzhou 510006, Guangdong, Peoples R China
Huang, Liangbin
Wang, Zhaoyang
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S China Normal Univ, Sch Chem & Environm, Guangzhou 510006, Guangdong, Peoples R ChinaS China Normal Univ, Sch Chem & Environm, Guangzhou 510006, Guangdong, Peoples R China
Wang, Zhaoyang
Jiang, Huanfeng
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S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R ChinaS China Normal Univ, Sch Chem & Environm, Guangzhou 510006, Guangdong, Peoples R China
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Osaka Univ, Grad Sch Engn, Dept Appl Chem, Suita, Osaka 5650871, JapanOsaka Univ, Grad Sch Engn, Dept Appl Chem, Suita, Osaka 5650871, Japan
Okumura, Sota
Takeda, Youhei
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Osaka Univ, Grad Sch Engn, Dept Appl Chem, Suita, Osaka 5650871, Japan
Osaka Univ, Grad Sch Engn, Frontier Res Base Global Young Researchers, Suita, Osaka 5650871, JapanOsaka Univ, Grad Sch Engn, Dept Appl Chem, Suita, Osaka 5650871, Japan
Takeda, Youhei
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Kiyokawa, Kensuke
Minakata, Satoshi
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Osaka Univ, Grad Sch Engn, Dept Appl Chem, Suita, Osaka 5650871, JapanOsaka Univ, Grad Sch Engn, Dept Appl Chem, Suita, Osaka 5650871, Japan
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Univ Paris Saclay, Univ Paris Sud, Inst Chim Subst Nat, CNRS UPR 2301, 1 Av Terrasse, F-91198 Gif Sur Yvette, FranceUniv Paris Saclay, Univ Paris Sud, Inst Chim Subst Nat, CNRS UPR 2301, 1 Av Terrasse, F-91198 Gif Sur Yvette, France
Thanh Binh Nguyen
Retailleau, Pascal
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Univ Paris Saclay, Univ Paris Sud, Inst Chim Subst Nat, CNRS UPR 2301, 1 Av Terrasse, F-91198 Gif Sur Yvette, FranceUniv Paris Saclay, Univ Paris Sud, Inst Chim Subst Nat, CNRS UPR 2301, 1 Av Terrasse, F-91198 Gif Sur Yvette, France
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Univ Fed Santa Maria, Dept Quim, NUQUIMHE, BR-97105900 Santa Maria, RS, BrazilUniv Fed Santa Maria, Dept Quim, NUQUIMHE, BR-97105900 Santa Maria, RS, Brazil
Bonacorso, HG
Marques, LML
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Univ Fed Santa Maria, Dept Quim, NUQUIMHE, BR-97105900 Santa Maria, RS, BrazilUniv Fed Santa Maria, Dept Quim, NUQUIMHE, BR-97105900 Santa Maria, RS, Brazil
Marques, LML
Zanatta, N
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Univ Fed Santa Maria, Dept Quim, NUQUIMHE, BR-97105900 Santa Maria, RS, BrazilUniv Fed Santa Maria, Dept Quim, NUQUIMHE, BR-97105900 Santa Maria, RS, Brazil
Zanatta, N
Martins, MAP
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Univ Fed Santa Maria, Dept Quim, NUQUIMHE, BR-97105900 Santa Maria, RS, BrazilUniv Fed Santa Maria, Dept Quim, NUQUIMHE, BR-97105900 Santa Maria, RS, Brazil