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2,945 Newest Publications in advanced synthesis & catalysis

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Visible Light Activated Radical Denitrative Benzoylation of β‐Nitrostyrenes: A Photocatalytic Approach to Chalcones

19-Jan-2018 | Shubhangi Tripathi, Ritu Kapoor, Lal Dhar Yadav, Advanced Synthesis & Catalysis, 2018

A metal‐free, convenient photocatalytic approach to chalcones from β‐nitrostyrenes and benzaldehydes via a radical denitrative benzoylation pathway is reported. The salient features of the protocol include the utilization of visible light as an inexpensive and ecosustainable energy source, ...

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I2‐Triggered Reductive Generation of N‐Centered Iminyl Radicals: An Isatin‐to‐Quinoline Strategy for the Introduction of Primary Amides

19-Jan-2018 | Qinghe Gao, Zhao-Min Liu, Yakun Wang, Xia Wu, Jixia Zhang, Anxin Wu, Advanced Synthesis & Catalysis, 2018

An efficient and alternative isatin‐to‐quinoline strategy illustrates the metal‐like behavior of molecular iodine in the N‐O reduction of ketoxime acetates. This process involves N‐O/C‐N bond cleavages and C‐C/C‐N bond formation to furnish pharmacologically significant quinoline‐4‐carboxamide ...

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Carboxyl‐Directed Conjugate Addition of C‒H Bonds to α,ß‐Unsaturated Ketones in Air and Water

19-Jan-2018 | Wen-jing Han, Fan Pu, Chao-Jun Li, Zhong-Wen Liu, Juan Fan, Xian-Ying Shi, Advanced Synthesis & Catalysis, 2018

A simple ruthenium‐catalyzed conjugate addition of C‒H bonds to α,ß‐unsaturated ketones directed by a removable carboxyl group was developed as an effective protocol to synthesize ortho‐alkylated benzoic acids in a greener manner. Without any additives, satisfactory to excellent yields of the ...

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Conversion of Primary Amines to Symmetrical Secondary and Tertiary Amines using a Co‐Rh Heterobimetallic Nanocatalyst

19-Jan-2018 | Hyunho Chung, Seulgi Han, Ji Hoon Park, Young Keun Chung, Advanced Synthesis & Catalysis, 2018

Symmetrical tertiary amines have been efficiently realized from amine and secondary amines via deaminated homocoupling with heterogeneous bimetallic Co2Rh2/C as catalyst (molar ratio Co:Rh = 2:2). Unsymmetric secondary anilines were produced from the reaction of anilines with symmetric tertiary ...

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Conversion of Primary Amines to Symmetrical Secondary and Tertiary Amines using a Co‐Rh Heterobimetallic Nanocatalyst

19-Jan-2018 | Hyunho Chung, Seulgi Han, Ji Hoon Park, Young Keun Chung, Advanced Synthesis & Catalysis, 2018

Symmetrical tertiary amines have been efficiently realized from amine and secondary amines via deaminated homocoupling with heterogeneous bimetallic Co2Rh2/C as catalyst (molar ratio Co:Rh = 2:2). Unsymmetric secondary anilines were produced from the reaction of anilines with symmetric tertiary ...

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Evaluating Gold and Selenium Chemistry for Selective Transformations of Lignin Model Compounds

18-Jan-2018 | Leandro Andrade, Wagner Santos, Kevin Dias, Leidaiany Santos, Camila Kisukuri, Thenner Rodrigues, Rafael Geonmonond, ..., Advanced Synthesis & Catalysis, 2018

Applications of gold and selenium chemistry are reported as novel approaches to promote lignin depolymerization into more valuable chemicals via selective oxidation reactions (alcohol oxidations and Baeyer‐Villiger reactions). In this study, we proposed two different oxidative methodologies ...

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Chemoselective Flow Hydrogenation Approaches to Diversify the Cytotoxic Tetrahydroepoxyisoindole Carboxamide Scaffold

18-Jan-2018 | Lawson Spare, David Harman, Janice Aldrich-Wright, Thanh Nguyen, Christopher Gordon, Advanced Synthesis & Catalysis, 2018

Abstract: An Intramolecular Diels‐Alder cycloaddition reaction between a furan diene and an alkynic dienophile was performed within a flow hydrogenator fitted with an inert titanium column at 150 °C, no H2, under 100 bar pressure. A single column pass (tR = 1.6 min) afforded ≈ 55% conversion to ...

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Recovery and Recycling of Chiral Iridium(N,P Ligand) Catalysts from Hydrogenation Reactions

17-Jan-2018 | Andreas Pfaltz, Marc-André Müller, Stefan Gruber, Advanced Synthesis & Catalysis, 2018

Despite the high efficiency and broad scope of chiral iridium(N,P ligand) complexes as catalysts for asymmetric hydrogenation, the problem of catalyst recovery and recycling has so far attracted little attention. We have found that at the end of a hydrogenation reaction, iridium(N,P ligand) ...

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Recovery and Recycling of Chiral Iridium(N,P Ligand) Catalysts from Hydrogenation Reactions

17-Jan-2018 | Andreas Pfaltz, Marc-André Müller, Stefan Gruber, Advanced Synthesis & Catalysis, 2018

Despite the high efficiency and broad scope of chiral iridium(N,P ligand) complexes as catalysts for asymmetric hydrogenation, the problem of catalyst recovery and recycling has so far attracted little attention. We have found that at the end of a hydrogenation reaction, iridium(N,P ligand) ...

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Pd‐tBuONO Cocatalyzed Aerobic Indole Synthesis

17-Jan-2018 | Xiao-Shan Ning, Xin Liang, Kang-Fei Hu, Chuan-Zhi Yao, Jian-Ping Qu, Yan-Biao Kang, Advanced Synthesis & Catalysis, 2018

A Pd‐tBuONO co‐catalyzed scalable and practical synthesis of indoles with molecular oxygen as terminal oxidant is developed. Either terminal or internal 2‐vinylanilines could be smoothly converted to desired indoles under one general condition. This method has been evaluated in the large scale ...

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