scholarly journals Reactions of Rh(PNP) pincer complexes with terminal alkynes: homocoupling through a ring or not at all

2020 ◽  
Vol 49 (46) ◽  
pp. 16649-16652
Author(s):  
Thomas M. Hood ◽  
Adrian B. Chaplin
Keyword(s):  
Pincer Complexes ◽  
Coupling Reactions ◽  
Terminal Alkynes ◽  
Terminal Alkyne ◽  
Pincer Ligand ◽  
Alkyne Coupling

“Switching on” a metal's capacity to promote terminal alkyne coupling reactions using a macrocyclic pincer ligand.

scholarly journals Terminal Alkyne Coupling Reactions through a Ring: Mechanistic Insights and Regiochemical Switching

2018 ◽  
Vol 130 (37) ◽  
pp. 12179-12182 ◽  
Author(s):  
Caroline M. Storey ◽  
Matthew R. Gyton ◽  
Rhiann E. Andrew ◽  
Adrian B. Chaplin
Keyword(s):  
Coupling Reactions ◽  
Terminal Alkyne ◽  
Alkyne Coupling

scholarly journals O,N,N-Pincer ligand effects on oxidatively induced carbon–chlorine coupling reactions at palladium

2015 ◽  
Vol 44 (13) ◽  
pp. 6040-6051 ◽  
Author(s):  
Luka A. Wright ◽  
Eric G. Hope ◽  
Gregory A. Solan ◽  
Warren B. Cross ◽  
Kuldip Singh
Keyword(s):  
Structural Properties ◽  
Pincer Complexes ◽  
Coupling Reactions ◽  
Pincer Ligand ◽  
Ligand Effects

The structural properties of a series of ONN-Pd(ii) chloride pincer complexes have been shown to influence the conversion to 4-chlorotoluene upon oxidation with di-p-tolyliodonium triflate.

scholarly journals Terminal Alkyne Coupling Reactions Through a Ring: Effect of Ring Size on Rate and Regioselectivity

2020 ◽  
Vol 26 (64) ◽  
pp. 14715-14723 ◽  
Author(s):  
Caroline M. Storey ◽  
Matthew R. Gyton ◽  
Rhiann E. Andrew ◽  
Adrian B. Chaplin
Keyword(s):  
Ring Size ◽  
Coupling Reactions ◽  
Terminal Alkyne ◽  
Alkyne Coupling ◽  
Ring Effect

scholarly journals Terminal Alkyne Coupling Reactions through a Ring: Mechanistic Insights and Regiochemical Switching

2018 ◽  
Vol 57 (37) ◽  
pp. 12003-12006 ◽  
Author(s):  
Caroline M. Storey ◽  
Matthew R. Gyton ◽  
Rhiann E. Andrew ◽  
Adrian B. Chaplin
Keyword(s):  
Coupling Reactions ◽  
Terminal Alkyne ◽  
Alkyne Coupling

Effect of Hydrated Metal Salts on the Coordination Product of Cobalt(II) halide and PNP Type Ligand, 2,6-bis(di-tertbutylphosphinomethyl) pyridine

2018 ◽  
Author(s):  
Tasneem Siddiquee ◽  
Abdul Goni
Keyword(s):  
Metal Salts ◽  
Molar Ratio ◽  
Pincer Complexes ◽  
Asymmetric Unit ◽  
X Ray Diffraction ◽  
Pincer Ligand ◽  
Tetrahedral Geometry ◽  
X Ray ◽  
Distorted Tetrahedral Geometry ◽  
Cobalt Center

Chemical treatment of CoX<sub>2</sub><b><sup>. </sup></b>6H<sub>2</sub>O (X = Cl, Br, I) with the potentially tridentate PNP pincer ligand 2,6-bis(di-<i>tert</i>-butylphosphinomethyl)pyridine in 1:1 molar ratio results in cobalt(II) halide-PNP pincer complexes. The effect of the hydrated metal source on molecular structure and geometry of the complexes was studied by single crystal X-ray diffraction analysis. The complexes are neutral and the cobalt center adopts a penta-coordinate system with potential atropisomerization. Within the unit cell there are two distinct molecules per asymmetric unit. One of the two phosphorus atoms in the PNP ligand was observed to be partially oxidized to phosphinoxide. Disorder in the structure reflects a mixture of square pyramidal and distorted tetrahedral geometry.

Cross-Coupling Reactions with 2-Amino-/Acetylamino-Substituted 3-Iodo-1,4-naphthoquinones: Convenient Synthesis of Novel Alkenyl- and Alkynylnaphthoquinones and Derivatives

Synthesis ◽  
2021 ◽  
Author(s):  
Felipe C. Demidoff ◽  
Leandro L. de Carvalho ◽  
Eduardo José P. Rodrigues Filho ◽  
Andréa Luzia F. de Souza ◽  
Chaquip D. Netto
Keyword(s):  
Click Chemistry ◽  
Organic Synthesis ◽  
Biological Activities ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Large Array ◽  
Terminal Alkyne ◽  
Co Catalyst ◽  
Cross Coupling Reactions ◽  
Convenient Synthesis

AbstractFunctionalized 1,4-naphthoquinones have been employed as versatile synthons in organic synthesis, in addition to presenting a large array of biological activities. Herein, the applications of 2-amino-/ acetylamino-substituted 3-iodo-1,4-naphthoquinones in cross-coupling reactions are described to successfully afford sixteen novel 3-styryl-1,4-naphthoquinones (amino-stilbene-quinone hybrids) and four 3-alkynyl-1,4-naphthoquinone in overall good yields. Interestingly, the alkynylated derivatives could be obtained from ligand- and Pd-free CuI-mediated cross-coupling reactions, after extensive investigations to exclude Pd as a co-catalyst. Lastly, the desilanized terminal alkyne was subjected to click chemistry reactions to give two novel triazole-1,4-naphthoquinone hybrids.

scholarly journals Cobalt Pincer Complexes in Catalytic C–H Borylation: The Pincer Ligand Flips Rather Than Dearomatizes

ACS Catalysis ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 10606-10618 ◽  
Author(s):  
Haixia Li ◽  
Jennifer V. Obligacion ◽  
Paul J. Chirik ◽  
Michael B. Hall
Keyword(s):  
Pincer Complexes ◽  
Pincer Ligand
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