Reducing-Agent-Free Convergent Synthesis of Hydroxyimino-Decorated Tetracyclic Fused Cinnolines via RhIII-Catalyzed Annulation Using Nitroolefins

2021 ◽  
Vol 86 (3) ◽  
pp. 2734-2747
Author(s):  
Pidiyara Karishma ◽  
Chikkagundagal K. Mahesha ◽  
Sanjay K. Mandal ◽  
Rajeev Sakhuja
Keyword(s):  
Reducing Agent ◽  
Convergent Synthesis

scholarly journals Convergent Synthesis of Polysubstituted Furans via Catalytic Phosphine Mediated Multicomponent Reactions

Molecules ◽  
2019 ◽  
Vol 24 (24) ◽  
pp. 4595
Author(s):  
Xia Fan ◽  
Rongshun Chen ◽  
Jie Han ◽  
Zhengjie He
Keyword(s):  
Multicomponent Reactions ◽  
Wittig Reaction ◽  
Functional Group ◽  
Cascade Reaction ◽  
Reducing Agent ◽  
Synthetic Method ◽  
Convergent Synthesis ◽  
Acyl Chlorides ◽  
Intramolecular Wittig Reaction ◽  
Activated Olefins

Tri- or tetrasubstituted furans have been prepared from terminal activated olefins and acyl chlorides or anhydrides by a multicomponental convergent synthesis mode. Instead of stoichiometric nBu3P, only catalytic nBu3P or nBu3P=O is needed to furnish the furans in modest to excellent yields with a good functional group tolerance under the aid of reducing agent silane. This synthetic method features a silane-driven catalytic intramolecular Wittig reaction as a key annulation step and represents the first successful application of catalytic Wittig reaction in multicomponent cascade reaction.

Carbon Monoxide Related Reductions

INEOS OPEN ◽  
2020 ◽  
Vol 3 ◽  
Author(s):  
O. I. Afanasyev ◽  
◽  
D. Chusov ◽  
Keyword(s):  
Organic Chemistry ◽  
Carbon Monoxide ◽  
Reducing Agent ◽  
Current Development ◽  
Efficient Route ◽  
Development Prospects

Carbon monoxide is a unique reducing agent that is only gaining popularity in organic chemistry. This review highlights the main approaches to the application of CO as a reducing agent, summarizes and critically analyzes the key trends in this field, and describes the current development prospects. Potentially the most selective and efficient route for the realization of these processes is demonstrated.

OESTRADIOL, A REDUCING AGENT FOR ANDROGENS IN LIVERTISSUE

1967 ◽  
Vol 56 (1_Suppl) ◽  
pp. S62
Author(s):  
M. Wenzel ◽  
K. Pollow
Keyword(s):  
Reducing Agent

Photochemical and Electrochemical Reduction of Carbon Dioxide Catalyzed by a Polyoxometalate-Organic Photosensitizer Complex

2018 ◽  
Author(s):  
Chandan Dey ◽  
Ronny Neumann
Keyword(s):  
Carbon Dioxide ◽  
Cyclic Voltammetry ◽  
Formic Acid ◽  
Electrochemical Reduction ◽  
Mass Spectroscopy ◽  
Photochemical Reactions ◽  
Reducing Agent ◽  
Covalent Attachment ◽  
Hybrid Complex ◽  
Open Face

<p>A manganese substituted Anderson type polyoxometalate, [MnMo<sub>6</sub>O<sub>24</sub>]<sup>9-</sup>, tethered with an anthracene photosensitizer was prepared and used as catalyst for CO<sub>2</sub> reduction. The polyoxometalate-photosensitizer hybrid complex, obtained by covalent attachment of the sensitizer to only one face of the planar polyoxometalate, was characterized by NMR, IR and mass spectroscopy. Cyclic voltammetry measurements show a catalytic response for the reduction of carbon dioxide, thereby suggesting catalysis at the manganese site on the open face of the polyoxometalate. Controlled potentiometric electrolysis showed the reduction of CO<sub>2</sub> to CO with a TOF of ~15 sec<sup>-1</sup>. Further photochemical reactions showed that the polyoxometalate-anthracene hybrid complex was active for the reduction of CO<sub>2</sub> to yield formic acid and/or CO in varying amounts dependent on the reducing agent used. Control experiments showed that the attachment of the photosensitizer to [MnMo<sub>6</sub>O<sub>24</sub>]<sup>9-</sup> is necessary for photocatalysis.</p><div><br></div>

Rheological Behaviour of Diutan Gum and Its Effects as a Drag Reducing Agent

2019 ◽  
Author(s):  
Walber Ronconi dos Santos ◽  
Edson Soares ◽  
Renato Siqueira
Keyword(s):  
Rheological Behaviour ◽  
Reducing Agent

Studying the Stage of Nitric Oxide Desorption from the Surfaces of CuO/γ-Al2O3 Catalysts, with or without a Reducing Agent

2020 ◽  
Vol 12 (3) ◽  
pp. 255-264
Author(s):  
Yu. V. Dubinin ◽  
N. A. Tsereshko ◽  
V. A. Yakovlev
Keyword(s):  
Nitric Oxide ◽  
Reducing Agent
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