Bulky Titanium Amides: C-H Bond Activation under Mild Conditions

2014 ◽  
Vol 2014 (8) ◽  
pp. 1289-1302 ◽  
Author(s):  
Christian Adler ◽  
Alexander Bekurdts ◽  
Detlev Haase ◽  
Wolfgang Saak ◽  
Marc Schmidtmann ◽  
...  
Keyword(s):  
Bond Activation ◽  
Mild Conditions

Pt-Pd Nanoalloy for the Unprecedented Activation of Carbon-Fluorine Bond at Low Temperature

2019 ◽  
Author(s):  
Raghu Nath Dhital ◽  
keigo nomura ◽  
Yoshinori Sato ◽  
Setsiri Haesuwannakij ◽  
Masahiro Ehara ◽  
...  
Keyword(s):  
Activation Energy ◽  
Low Temperature ◽  
Dft Calculations ◽  
Bond Activation ◽  
Mild Conditions ◽  
Selective Transformation ◽  
Rate Determining Step ◽  
Highly Active ◽  
Harsh Conditions ◽  
Reaction Profile

Carbon-Fluorine (C-F) bonds are considered the most inert organic functionality and their selective transformation under mild conditions remains challenging. Herein, we report a highly active Pt-Pd nanoalloy as a robust catalyst for the transformation of C-F bonds into C-H bonds at low temperature, a reaction that often required harsh conditions. The alloying of Pt with Pd is crucial to activate C-F bond. The reaction profile kinetics revealed that the major source of hydrogen in the defluorinated product is the alcoholic proton of 2-propanol, and the rate-determining step is the reduction of the metal upon transfer of the <i>beta</i>-H from 2-propanol. DFT calculations elucidated that the key step is the selective oxidative addition of the O-H bond of 2-propanol to a Pd center prior to C-F bond activation at a Pt site, which crucially reduces the activation energy of the C-F bond. Therefore, both Pt and Pd work independently but synergistically to promote the overall reaction

scholarly journals Pd/Ni-Catalyzed Germa-Suzuki coupling via dual Ge–F bond activation

2021 ◽  
Author(s):  
Hajime Kameo ◽  
Akihiro Mushiake ◽  
Tomohito Isasa ◽  
Hiroyuki Matsuzaka ◽  
Didier Bourissou
Keyword(s):  
Bond Activation ◽  
Suzuki Coupling ◽  
Mild Conditions ◽  
Dual Activation

Pd/Ni → Ge–F interactions supported by phosphine-chelation were found to trigger dual activation of Ge–F bonds under mild conditions.

scholarly journals Direct Sulfoxidation of Aromatic Methyl Thioethers with Aryl Halides by Copper-Catalyzed C(sp3)–H Bond Activation

Catalysts ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 105
Author(s):  
Runsheng Xu ◽  
Yueer Zhu ◽  
Feixiang Xiong ◽  
Suli Tong
Keyword(s):  
Bond Activation ◽  
Bond Formation ◽  
Aryl Halides ◽  
Biologically Active ◽  
Mild Conditions ◽  
Methyl Thioethers ◽  
High Yields

A copper-catalyzed direct sulfoxidation reaction by C(sp3)–H bond activation has been developed. Starting from sample aromatic methyl thioethers with aryl halides, versatile biologically-active arylbenzylsulfoxide derivatives were efficiently synthesized in good to high yields under mild conditions. This new methodology provides an economical approach toward C(sp3)–C(sp2) bond formation.

scholarly journals C–H and N–H Bond Annulation of Benzamides with Isonitriles Catalyzed by Cobalt(III)

Synthesis ◽  
2017 ◽  
Vol 49 (17) ◽  
pp. 3937-3944 ◽  
Author(s):  
Deepti Kalsi ◽  
Nagaraju Barsu ◽  
Pardeep Dahiya ◽  
Basker Sundararaju
Keyword(s):  
Functional Group ◽  
Bond Activation ◽  
Green Solvent ◽  
Tert Butyl ◽  
Mild Conditions

A simple efficient, atom-economical procedure was developed for the cobalt-catalyzed C–H bond annulation of benzamides with isonitriles under mild conditions. The reaction tolerates a variety of functional group including heterocycles. Diverse 3-(alkylimino)-2-quinolin-8-yl-2,3-dihydro-1H-isoindol-1-ones were synthesized using isonitriles as the C1 source through C–H and N–H bond annulation via C–H bond activation in a ‘green’ solvent. Vinylamides were also used similarly with tert-butyl isonitrile to give 3-(tert-butylimino)-1-quinolin-8-yl-1H-pyrrol-2(5H)-ones.

Unveiling the potential of scandium complexes for methane C–H bond activation: a computational study

2019 ◽  
Vol 43 (31) ◽  
pp. 12257-12263 ◽  
Author(s):  
Ana Paula de Lima Batista ◽  
Antonio G. S. de Oliveira-Filho ◽  
Ataualpa A. C. Braga
Keyword(s):  
Bond Activation ◽  
Computational Study ◽  
Mild Conditions

Sc(i) complexes activate methane C–H bonds under mild conditions.

Silver(i) NHC mediated C–C bond activation of alkyl nitriles and catalytic efficiency in oxazoline synthesis

2015 ◽  
Vol 51 (41) ◽  
pp. 8699-8701 ◽  
Author(s):  
Rachael Heath ◽  
Helge Müller-Bunz ◽  
Martin Albrecht
Keyword(s):  
High Efficiency ◽  
Bond Activation ◽  
Aldol Condensation ◽  
Bond Cleavage ◽  
Catalytic Efficiency ◽  
Carbene Complexes ◽  
Ambient Temperatures ◽  
Mild Conditions ◽  
New Applications

C–C bond cleavage is achieved with silver carbene species under relatively mild conditions (80 °C) stoichiometrically, and aldol condensation is catalyzed at ambient temperatures in high efficiency, with turnover numbers up to 5000 h−1, thus disclosing new applications and synthetic opportunities based on easily accessible silver carbene complexes.

ortho ‐Allylation of 1‐Arylpyrazoles with Allyl Phenyl Ether via Iron‐Catalyzed CH Bond Activation under Mild Conditions

2014 ◽  
Vol 356 (7) ◽  
pp. 1481-1485 ◽  
Author(s):  
Sobi Asako ◽  
Jakob Norinder ◽  
Laurean Ilies ◽  
Naohiko Yoshikai ◽  
Eiichi Nakamura
Keyword(s):  
Bond Activation ◽  
Phenyl Ether ◽  
Mild Conditions ◽  
Allyl Phenyl Ether

Cp*Co(iii)-catalyzed vinylic C–H bond activation under mild conditions: expedient pyrrole synthesis via (3 + 2) annulation of enamides and alkynes

2016 ◽  
Vol 3 (7) ◽  
pp. 836-840 ◽  
Author(s):  
Dhanaji M. Lade ◽  
Amit B. Pawar
Keyword(s):  
Catalytic System ◽  
Reaction Temperature ◽  
Bond Activation ◽  
Mild Conditions ◽  
System P

Cobalt(iii)-catalyzed (3 + 2) oxidative annulation of enamides and alkynes for the synthesis of pyrroles has been developed under mild conditions and simple tuning of reaction temperature lead to the formation of bothN-Ac andN-H pyrroles under an exactly identical catalytic system.

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