scholarly journals Recent Advances in Cooperative N-Heterocyclic Carbene Catalysis

2021 ◽  
Author(s):  
Hideto Miyabe
Keyword(s):  
Transition Metal ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Heterocyclic Carbenes ◽  
Recent Advances

The N-heterocyclic carbenes (NHCs) open the new field of organocatalysis, leading to the dramatic progress on the cooperative NHC catalysis with transition-metal catalysts or photocatalysts.

Directing-Group-Assisted Transition-Metal-Catalyzed Direct C–H Oxidative Annulation of Arenes with Alkynes for Facile Construction of Various Oxygen Heterocycles

Synthesis ◽  
2020 ◽  
Vol 52 (07) ◽  
pp. 993-1006 ◽  
Author(s):  
Guanghua Kuang ◽  
Guangyuan Liu ◽  
Xingxing Zhang ◽  
Naihao Lu ◽  
Yiyuan Peng ◽  
...  
Keyword(s):  
Transition Metal ◽  
Noble Metals ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Research Papers ◽  
Recent Advances ◽  
Oxygen Heterocycles ◽  
Directing Group ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed

The most recent advances in the construction of oxygen heterocycles by the directing-group-assisted transition-metal-catalyzed direct oxidative annulation of arenes with diverse alkynes are summarized in this review. More than 140 recent research papers and many closely related reviews are referenced in this paper. Nine different oxygen heterocycles frameworks are discussed. Several traditional transition-metal catalysts as well as some classical non-noble metals are utilized to promote the annulation. Three plausible controlling models are disclosed to clarify the excellent regioselectivity outcomes achieved in case of unsymmetrical alkyne substrates.1 Introduction2 Coumarins3 I socoumarins and Their Analogues4 2-Pyrones and Their Analogues5 Chromones and Chroman-4-ones6 Chromenes and Isochromenes7 Fused Polycyclic Oxygen Heteroaromatics8 Benzofurans, Dihydrobenzofurans, and Furans9 Phthalides and Benzofuranones10 Benzoxepines11 Conclusion

Recent advances in metal free- and late transition metal-catalysed hydroamination of unactivated alkenes

2015 ◽  
Vol 5 (4) ◽  
pp. 2017-2037 ◽  
Author(s):  
Elise Bernoud ◽  
Clément Lepori ◽  
Mohamed Mellah ◽  
Emmanuelle Schulz ◽  
Jérôme Hannedouche
Keyword(s):  
Transition Metal ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Late Transition Metal ◽  
Metal Free ◽  
Recent Advances ◽  
Late Transition

This Perspective article outlines some of the recent advancements in the development of (chiral) metal-free and late transition metal catalysts for hydroamination of unactivated alkenes.

Indium(III)-Catalyzed Transformations of Alkynes: Recent Advances in Carbo- and Heterocyclization Reactions

Synthesis ◽  
2017 ◽  
Vol 49 (22) ◽  
pp. 4931-4941 ◽  
Author(s):  
Nicklas Selander ◽  
Stalin Pathipati ◽  
Angela van der Werf
Keyword(s):  
Transition Metal ◽  
Environmentally Friendly ◽  
Short Review ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Nucleophilic Additions ◽  
Terminal Alkynes ◽  
Cyclization Reactions ◽  
Recent Advances

The use of a well-chosen catalyst is instrumental for the development of more efficient, economical and environmentally friendly reactions. In recent decades, indium-based catalysts have proven to be competitive and useful alternatives to transition-metal catalysts such as silver and gold. In this short review, we present some of the recent advances in indium(III)-catalyzed transformations of alkynes, with a focus on cyclization reactions.1 Introduction2 Terminal Alkynes as Nucleophiles3 Nucleophilic Additions to Alkynes4 Carbo- and Heterocyclization Reactions4.1 Carbocyclization4.2 Oxygen-Based Heterocycles4.3 Nitrogen-Based Heterocycles4.4 Sulfur-Based Heterocycles5 Conclusion

Recent advances in the field of diolefin polymerization with transition metal catalysts

1993 ◽  
Vol 66 (1) ◽  
pp. 231-244 ◽  
Author(s):  
Lido Porri ◽  
Antonino Giarrusso ◽  
Giovanni Ricci
Keyword(s):  
Transition Metal ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Recent Advances

Recent Advances in Cross-Couplings of Functionalized Organozinc Reagents

Synthesis ◽  
2021 ◽  
Author(s):  
Baosheng Wei ◽  
Paul Knochel
Keyword(s):  
Transition Metal ◽  
Room Temperature ◽  
Cross Coupling ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Iron Catalysts ◽  
Organic Azides ◽  
Recent Advances ◽  
Organozinc Reagents

Cross-couplings involving organozinc reagents require usually a Pd-catalysis (Negishi cross-coupling), however, uncatalyzed cross-couplings of zinc organometallics proceed well in the absence of transition-metal catalysts with reactive electrophiles such as benzal 1,1-diacetates, benzhydryl acetates, and iminium trifluoroacetates. Also, organozinc compounds undergo C-N bond formations with O-benzoylhydroxylamines or organic azides in the presence of cobalt- or iron-catalysts. Besides, highly diastereoselective and enantioselective cross-couplings can be readily performed with room-temperature configurationally stable alkylzinc species producing diastereoselectively and enantiomerically enriched products. Finally, highly regioselective magnesiations of functionalized arenes and heteroarenes undergo Negishi (after transmetalation with ZnCl2) or Cu-catalyzed cross-couplings. 1 Introduction 2 Uncatalyzed Cross-Couplings of Organozinc Reagents with Highly Electrophilic Partners 3 Iron- and Cobalt-catalyzed Aminations Using Organozinc Reagents 4 Stereo- and Regioselective Cross-couplings of Organozinc Reagents 5 Conclusion

Phosphorus-Containing Groups Assisted Transition Metal Catalyzed C-H Activation Reactions

2019 ◽  
Vol 23 (2) ◽  
pp. 103-135 ◽  
Author(s):  
Chun-Ni Zhou ◽  
Zi-Ang Zheng ◽  
George Chang ◽  
Yuan-Chao Xiao ◽  
Yang-Huan Shen ◽  
...  
Keyword(s):  
Transition Metal ◽  
Functional Group ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Mechanistic Study ◽  
Recent Advances ◽  
Phosphorus Containing ◽  
Directing Group ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed

Over the last few decades, transition metal-catalyzed direct C-H activation with the assistance of a coordinating directing group has emerged as an atom- and stepeconomical synthetic tools to transform C–H bonds into carbon-carbon or carbonheteroatom bonds. Although the strategies involving regioselective C–H cleavage assisted by various directing groups have been extensively reviewed in the literature, we now attempt to give an overview of the recent advances on phosphorus-containing functional group assisted C-H activation reactions catalyzed by transition-metal catalysts including mechanistic study and synthetic applications. The discussion is directed towards C-H olefination, C-H activation/cyclization, C-H arylation, C-H amination, C-H hydroxylation and acetoxylation as well as miscellaneous C-H activation.

Homo- and heterometallic polynuclear transition metal catalysts for alkane C H bonds oxidative functionalization: Recent advances

2018 ◽  
Vol 355 ◽  
pp. 199-222 ◽  
Author(s):  
Dmytro S. Nesterov ◽  
Oksana V. Nesterova ◽  
Armando J.L. Pombeiro
Keyword(s):  
Transition Metal ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Oxidative Functionalization ◽  
Recent Advances

Recent Advances in Catalytic Transfer Hydrogenation with Formic Acid over Heterogeneous Transition Metal Catalysts

ACS Catalysis ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 1071-1095
Author(s):  
Renfeng Nie ◽  
Yuewen Tao ◽  
Yunqing Nie ◽  
Tianliang Lu ◽  
Jianshe Wang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Formic Acid ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Transfer Hydrogenation ◽  
Catalytic Transfer Hydrogenation ◽  
Recent Advances ◽  
Catalytic Transfer
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