Rhodium(I)-Catalyzed Reactions via Carbon-Hydrogen Bond Cleavage

2019 ◽  
pp. 277-297
Author(s):  
Takanori Shibata
Keyword(s):  
Hydrogen Bond ◽  
Bond Cleavage ◽  
Catalyzed Reactions

scholarly journals Carbon-Hydrogen Bond Activation of Phenyldi(2- Thienyl)Phosphine at A Triruthenium Cluster Center

2012 ◽  
Vol 25 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Shahed Rana ◽  
Shishir Ghosh ◽  
Shariff E Kabir
Keyword(s):  
Hydrogen Bond ◽  
Elemental Analysis ◽  
Bond Activation ◽  
Bond Cleavage ◽  
Chemical Society ◽  
Cluster Center ◽  
Carbon Hydrogen Bond Activation

Ketyl-initiated reaction between Ru3(CO)12 and phenyldi(2-thienyl)phosphine (PhPTh2) furnished simple phosphine-substituted triruthenium clusters [Ru3(CO)10(PhPTh2)21 and [Ru3(CO)9(PhPTh2)3] 2. Heating 1 in boiling benzene afforded [Ru3(CO)8{?3- PhThP(C4H2S)}(PhPTh2)] 3 by carbon-hydrogen bond cleavage of a coordinated thienylphosphine ligand. All three new clusters have been characterized by elemental analysis, IR and NMR spectroscopic data.DOI: http://dx.doi.org/10.3329/jbcs.v25i1.11764 Journal of Bangladesh Chemical Society, Vol. 25(1), 1-6, 2012

Double C–H Activation for the C–C bond Formation Reactions

2018 ◽  
Vol 15 (7) ◽  
pp. 882-903 ◽  
Author(s):  
Jialin Liu ◽  
Xiaoyu Xiong ◽  
Jie Chen ◽  
Yuntao Wang ◽  
Ranran Zhu ◽  
...  
Keyword(s):  
Molecular Design ◽  
Bond Cleavage ◽  
Bond Formation ◽  
Hypervalent Iodine ◽  
Coupling Reactions ◽  
Bond Forming ◽  
Direct Functionalization ◽  
Catalyzed Reactions ◽  
Medium Ring ◽  
Bond Formation Reactions

Background: Among the numerous bond-forming patterns, C–C bond formation is one of the most useful tools for building molecules for the chemical industry as well as life sciences. Recently, one of the most challenging topics is the study of the direct coupling reactions via multiple C–H bond cleavage/activation processes. A number of excellent reviews on modern C–H direct functionalization have been reported by Bergman, Bercaw, Yu and others in recent years. Among the large number of available methodologies, Pdcatalyzed reactions and hypervalent iodine reagent mediated reactions represent the most popular metal and non-metal involved transformations. However, the comprehensive summary of the comparison of metal and non-metal mediated transformations is still not available. Objective: The review focuses on comparing these two types of reactions (Pd-catalyzed reactions and hypervalent iodine reagent mediated reactions) based on the ways of forming new C–C bonds, as well as the scope and limitations on the demonstration of their synthetic applications. Conclusion: Comparing the Pd-catalyzed strategies and hypervalent iodine reagent mediated methodologies for the direct C–C bond formation from activation of C-H bonds, we clearly noticed that both strategies are powerful tools for directly obtaining the corresponding pruducts. On one hand, the hypervalent iodine reagents mediated reactions are normally under mild conditions and give the molecular diversity without the presence of transition-metal, while the Pd-catalyzed approaches have a broader scope for the wide synthetic applications. On the other hand, unlike Pd-catalyzed C-C bond formation reactions, the study towards hypervalent iodine reagent mediated methodology mainly focused on the stoichiometric amount of hypervalent iodine reagent, while few catalytic reactions have been reported. Meanwhile, hypervalent iodine strategy has been proved to be more efficient in intramolecular medium-ring construction, while there are less successful examples on C(sp3)–C(sp3) bond formation. In summary, we have demonstrated a number of selected approaches for the formation of a new C–C bond under the utilization of Pd-catalyzed reaction conditions or hyperiodine reagents. The direct activations of sp2 or sp3 hybridized C–H bonds are believed to be important strategies for the future molecular design as well as useful chemical entity synthesis.

scholarly journals An Isolable Mononuclear Palladium(I) Amido Complex

2021 ◽  
Author(s):  
jian Liu ◽  
Melissa Bollmeyer ◽  
Yujeong Kim ◽  
Dengmengfei Xiao ◽  
Samantha N. Macmillan ◽  
...  
Keyword(s):  
Theoretical Study ◽  
Bond Cleavage ◽  
Primary Amines ◽  
Dispersion Force ◽  
Paramagnetic Resonance ◽  
X Ray ◽  
X Ray Crystallography ◽  
Pauli Repulsion ◽  
Catalyzed Reactions ◽  
Electron Paramagnetic

Mononuclear Pd(I) species are putative intermediates in Pd-catalyzed reactions, but our knowledge about them is limited due to difficulties in accessing them. Herein, we report the isolation of a Pd(I) amido complex, [(BINAP)Pd(NHArTrip )] (BINAP = 2,2′- bis(diphenylphosphino)-1,1′-binaphthalene, ArTrip = 2,6-bis(2’,4’,6’-triisopropylphenyl)phenyl), from the reaction of (BINAP)PdCl2 with LiNHArTrip. This Pd(I) amido species has been characterized by X-ray crystallography, electron paramagnetic resonance, and multi-edge Pd Xray absorption spectroscopy. Theoretical study revealed that, while the 3-electron-2-center π interaction between Pd and N in the Pd(I) complex imposes severe Pauli repulsion in its Pd–N bond, pronounced attractive inter-ligand dispersion force aids its stabilization. In accord with its electronic features, reactions of homolytic Pd–N bond cleavage and deprotonation of primary amines are observed on the Pd(I) amido complex.

Phosphorus–hydrogen bond cleavage on a Ph2PH-substituted μ3-thioxo dicobalt–iron cluster as a route to bridging phosphido and thiophosphine ligands

2002 ◽  
Vol 642 (1-2) ◽  
pp. 227-236 ◽  
Author(s):  
Jason D King ◽  
Martin J Mays ◽  
Chi-Yu Mo ◽  
Gregory A Solan ◽  
Gráinne Conole ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Bond Cleavage ◽  
Iron Cluster
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