scholarly journals Catalytic Enantioselective Transformations Involving C–H Bond Cleavage by Transition-Metal Complexes

2017 ◽  
Vol 117 (13) ◽  
pp. 8908-8976 ◽  
Author(s):  
Christopher G. Newton ◽  
Shou-Guo Wang ◽  
Caio C. Oliveira ◽  
Nicolai Cramer
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Bond Cleavage

scholarly journals The Exchange of Cyclometalated Ligands

Molecules ◽  
2021 ◽  
Vol 26 (1) ◽  
pp. 210
Author(s):  
Alexander D. Ryabov
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Bond Activation ◽  
Bond Cleavage ◽  
Cyclopalladated Complexes ◽  
Derivatives Of ◽  
Cyclometalated Ligand ◽  
Incoming Ligand

Reactions of cyclometalated compounds are numerous. This account is focused on one of such reactions, the exchange of cyclometalated ligands, a reaction between a cyclometalated compound and an incoming ligand that replaces a previously cyclometalated ligand to form a new metalacycle: + H-C*~Z ⇄ + H-C~Y. Originally discovered for PdII complexes with Y/Z = N, P, S, the exchange appeared to be a mechanistically challenging, simple, and convenient routine for the synthesis of cyclopalladated complexes. Over four decades it was expanded to cyclometalated derivatives of platinum, ruthenium, manganese, rhodium, and iridium. The exchange, which is also questionably referred to as transcyclometalation, offers attractive synthetic possibilities and assists in disclosing key mechanistic pathways associated with the C–H bond activation by transition metal complexes and C–M bond cleavage. Both synthetic and mechanistic aspects of the exchange are reviewed and discussed.

scholarly journals Recent Methodologies That Exploit C–C Single-Bond Cleavage of Strained Ring Systems by Transition Metal Complexes

2017 ◽  
Vol 117 (13) ◽  
pp. 9404-9432 ◽  
Author(s):  
Gabriele Fumagalli ◽  
Steven Stanton ◽  
John F. Bower
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Bond Cleavage ◽  
Single Bond ◽  
Ring Systems

Toward development of environmentally benign processes catalyzed by transition-metal complexes

2002 ◽  
Vol 74 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Akio Yamamoto
Keyword(s):  
Carboxylic Acid ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Bond Cleavage ◽  
Environmentally Benign ◽  
Aldehydes And Ketones ◽  
Catalytic Processes

On the basis of fundamental studies on the carbon­oxygen bond cleavage of various carboxylic acid derivatives, novel, atom-efficient, and environmentally benign catalytic processes to convert them into acids, aldehydes, and ketones have been developed.

Übergangsmetallkomplexe mit Schwefelliganden, LXXXI [Ru(NO)('S5')]Br, ein reaktiver Ruthenium-Schwefelligand- Nitrosyl-Komplex: Synthese und Reaktionen mit Azid und Amid/Transition Metal Complexes with Sulfur Ligands, LXXXI [Ru(NO)('S5')]Br, a Reactive Ruthenium Sulfur Ligand Nitrosyl Complex: Synthesis and Reactions with Azide and Amide

1992 ◽  
Vol 47 (1) ◽  
pp. 74-78 ◽  
Author(s):  
Dieter Sellmann ◽  
Michael Geck ◽  
Matthias Moll
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Bond Cleavage ◽  
Nitrosyl Complex ◽  
Sulfur Ligand

In order to investigate the potential conversion of coordinated NO into N2 ligands at Ru sulfur centers, the cationic Ru nitrosyl complex meso-[Ru(NO)('S5')]Br (1)** was synthesized by template alkylation of [NBu4][Ru(NO)('S2')2]** with (BrC2H4)2S. 1 is reactive towards nucleophiles. Reaction with azide yields N2O, N2 and [Ru('S5')]2 (2), reaction with LiNH2, NH3 and NEt3 leads to C-S bond cleavage in the 'S5' ligand of 1 and to the formation of a Ru nitrosyl vinylthioetherthiolate complex.

Übergangsmetallkomplexe mit Schwefelliganden, LVIII / Transition Metal Complexes with Sulfur Ligands, LVIII

1991 ◽  
Vol 46 (3) ◽  
pp. 303-306 ◽  
Author(s):  
Dieter Sellmann ◽  
Hans-Peter Neuner ◽  
Matthias Moll ◽  
Falk Knoch
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Bond Cleavage ◽  
Selective Reaction

The monocation [Ru(′S6′–CH=CH2)]+, [2]+, (′S6′–CH=CH2- = 2.3.11.12-dibenzo-1.4.7.10.13.16-hexathiaoctadec-17-ene(1–)) forms under normal conditions by S–C bond cleavage in an irreversible and selective reaction on treating salts of the dication [Ru(bzo2-18S6)]2+, [1]2+, (bzo2-18S6 = 2.3.11.12-dibenzo-1.4.7.10.13.16-hexathiacyclooctadecane) with one equivalent of base. This reaction demonstrates the drastic S–C activation in coordinated thioethers and should be taken into consideration when cofactors are isolated from metal sulfur enzymes.

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