New symmetrical N^N^N palladium(II) pincer complexes: synthesis, characterization and catalytic evaluation in the Suzuki-Miyaura cross-coupling reaction

New non-symmetric pincer palladacycles, containing [N,N,C] tridentate ligands are synthesized and their catalytic activities in the Suzuki–Miyaura cross coupling reaction are tested using water under aerobic conditions and IR irradiation.

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Towards phosphine-free Pd(II) pincer complexes for catalyzing Suzuki-Miyaura cross-coupling reaction in aqueous medium

Journal of Organometallic Chemistry ◽

10.1016/j.jorganchem.2017.03.045 ◽

2017 ◽

Vol 845 ◽

pp. 115-124 ◽

Cited By ~ 14

Author(s):

Peter Jerome ◽

Pushpanathan N. Sathishkumar ◽

Nattamai S.P. Bhuvanesh ◽

Ramasamy Karvembu

Keyword(s):

Aqueous Medium ◽

Coupling Reaction ◽

Cross Coupling ◽

Pincer Complexes ◽

Cross Coupling Reaction

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Ferromagnetic Chain Based on Verdazyl-Nitroxide Diradical

10.26434/chemrxiv.12367334.v1 ◽

2020 ◽

Author(s):

Evgeny Tretyakov ◽

Svetlana Zhivetyeva ◽

Pavel Petunin ◽

Dmitry Gorbunov ◽

Nina Gritsan ◽

...

Keyword(s):

Coupling Reaction ◽

Cross Coupling ◽

Ferromagnetic Coupling ◽

Nitronyl Nitroxide ◽

Triplet Ground State ◽

One Dimensional ◽

Cross Coupling Reaction ◽

Palladium Catalyzed ◽

Ferromagnetic Chain ◽

High Yields

Verdazyl-nitroxide diradicals were synthesized using the palladium-catalyzed cross-coupling reaction of the corresponding iodoverdazyls with a nitronyl nitroxide-2-ide gold(I) complex with high yields (up to 82%). The synthesized diradicals were found to be highly thermally stable and have a singlet (DEST » -64 cm–1) or triplet ground state (DEST ³ 25 and 100 cm–1), depending on which canonical hydrocarbon diradical type they belong to. Upon crystallization, triplet diradicals form unique one-dimensional (1D) spin S = 1 chains of organic diradicals with intrachain ferromagnetic coupling of J′/kB from 3 to 6 K.

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An Iron-Based Catalyst Enables The Enantioconvergent Synthesis of Chiral 1,1-Diarylalkanes Through a Suzuki-Miyaura Cross-Coupling Reaction

10.26434/chemrxiv.12582284.v1 ◽

2020 ◽

Author(s):

Chet Tyrol ◽

Nang Yone ◽

Connor Gallin ◽

Jeffery Byers

Keyword(s):

Coupling Reaction ◽

Cross Coupling ◽

Coupling Reactions ◽

Radical Intermediates ◽

Cross Coupling Reactions ◽

Cross Coupling Reaction ◽

Boronic Esters ◽

Carbon Centered Radical ◽

Iron Based ◽

High Yields

By using an iron-based catalyst, access to enantioenriched 1,1-diarylakanes was enabled through an enantioselective Suzuki-Miyaura crosscoupling reaction. The combination of a chiral cyanobis(oxazoline) ligand framework and 1,3,5-trimethoxybenzene additive were essential to afford high yields and enantioselectivities in cross-coupling reactions between unactivated aryl boronic esters and a variety of benzylic chlorides, including challenging ortho-substituted benzylic chloride substrates. Mechanistic investigations implicate a stereoconvergent pathway involving carbon-centered radical intermediates.

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Ni(0)-Catalyzed α-Allylic Alkylation of Regular Ketones with 1,3-Dienes under pH and Redox-neutral Conditions

10.26434/chemrxiv.7072646.v3 ◽

2019 ◽

Cited By ~ 1

Author(s):

Tiantian Chen ◽

Yang Yang ◽

Liyu Xie ◽

Haijian Yang ◽

Guangbin Dong ◽

...

Keyword(s):

Oxidative Addition ◽

Coupling Reaction ◽

Cross Coupling ◽

Dual Role ◽

Allylic Alkylation ◽

Cross Coupling Reaction ◽

Neutral Conditions

We report a Ni(0)-catalyzed cross coupling reaction between simple ketones and 1,3-dienes. A variety of a-allylic alkylation products were formed in an 1,2-addition manner with excellent regioselectivity. Water was found to significantly accelerate this transformation. A HO-Ni-H species generated from oxidative addition of Ni(0) to H2O is proposed to play a “dual role” in activating both the ketone and the diene substrate.

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