Palladium-catalyzed, unsymmetrical homocoupling of thiophenes via carbon–sulfur bond activation: a new avenue to homocoupling reactions

2017 ◽  
Vol 15 (37) ◽  
pp. 7830-7840
Author(s):  
Amir Hossein Vahabi ◽  
Abdolali Alizadeh ◽  
Hamid Reza Khavasi ◽  
Ayoob Bazgir
Keyword(s):  
Transition Metal ◽  
Bond Activation ◽  
Transition Metal Catalysis ◽  
Metal Catalysis ◽  
Palladium Catalyzed ◽  
Sulfur Bond

Introduction of an unprecedented pattern of reactivity, namely the C–N unsymmetrical homocoupling by joining the electrophilic and nucleophilic motifs of the substrate through transition-metal catalysis.

Carbon‐Sulfur Bond Constructions: From Transition‐Metal Catalysis to Sustainable Catalysis

2021 ◽  
Author(s):  
Pratheepkumar Annamalai ◽  
Ke‐Chien Liu ◽  
Satpal Singh Badsara ◽  
Chin‐Fa Lee
Keyword(s):  
Transition Metal ◽  
Transition Metal Catalysis ◽  
Metal Catalysis ◽  
Sulfur Bond

ChemInform Abstract: Tosylhydrazide-Promoted Palladium-Catalyzed Reaction of β-Aminoketones with o-Dihaloarenes: Combining Organocatalysis and Transition-Metal Catalysis.

ChemInform ◽  
2011 ◽  
Vol 42 (25) ◽  
pp. no-no
Author(s):  
Jose Barluenga ◽  
Noelia Quinones ◽  
Maria-Paz Cabal ◽  
Fernando Aznar ◽  
Carlos Valdes
Keyword(s):  
Transition Metal ◽  
Transition Metal Catalysis ◽  
Metal Catalysis ◽  
Palladium Catalyzed

scholarly journals Photosensitized direct C–H fluorination and trifluoromethylation in organic synthesis

2020 ◽  
Vol 16 ◽  
pp. 2151-2192
Author(s):  
Shahboz Yakubov ◽  
Joshua P Barham
Keyword(s):  
Transition Metal ◽  
Bond Activation ◽  
Cost Effective ◽  
Transition Metal Catalysis ◽  
Radical Mechanism ◽  
Future Planning ◽  
Metal Catalysis ◽  
Direct Fluorination ◽  
User Friendly ◽  
Exciting Development

The importance of fluorinated products in pharmaceutical and medicinal chemistry has necessitated the development of synthetic fluorination methods, of which direct C–H fluorination is among the most powerful. Despite the challenges and limitations associated with the direct fluorination of unactivated C–H bonds, appreciable advancements in manipulating the selectivity and reactivity have been made, especially via transition metal catalysis and photochemistry. Where transition metal catalysis provides one strategy for C–H bond activation, transition-metal-free photochemical C–H fluorination can provide a complementary selectivity via a radical mechanism that proceeds under milder conditions than thermal radical activation methods. One exciting development in C–F bond formation is the use of small-molecule photosensitizers, allowing the reactions i) to proceed under mild conditions, ii) to be user-friendly, iii) to be cost-effective and iv) to be more amenable to scalability than typical photoredox-catalyzed methods. In this review, we highlight photosensitized C–H fluorination as a recent strategy for the direct and remote activation of C–H (especially C(sp3)–H) bonds. To guide the readers, we present the developing mechanistic understandings of these reactions and exemplify concepts to assist the future planning of reactions.

Tosylhydrazide-Promoted Palladium-Catalyzed Reaction of β-Aminoketones witho-Dihaloarenes: Combining Organocatalysis and Transition-Metal Catalysis

2011 ◽  
Vol 123 (10) ◽  
pp. 2398-2401 ◽  
Author(s):  
José Barluenga ◽  
Noelia Quiñones ◽  
María-Paz Cabal ◽  
Fernando Aznar ◽  
Carlos Valdés
Keyword(s):  
Transition Metal ◽  
Transition Metal Catalysis ◽  
Metal Catalysis ◽  
Palladium Catalyzed
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