22871-77-8Relevant academic research and scientific papers
Cobalt-Catalyzed C(sp2)-C(sp3) Suzuki-Miyaura Cross Coupling
Ludwig, Jacob R.,Simmons, Eric M.,Wisniewski, Steven R.,Chirik, Paul J.
supporting information, (2020/11/02)
A cobalt-catalyzed method for the C(sp2)-C(sp3) Suzuki-Miyaura cross coupling of aryl boronic esters and alkyl bromides is described. Cobalt-ligand combinations were assayed with high-throughput experimentation, and cobalt(II) sources with trans-N,N′-dimethylcyclohexane-1,2-diamine (DMCyDA, L1) produced optimal yield and selectivity. The scope of this transformation encompassed steric and electronic diversity on the aryl boronate nucleophile as well as various levels of branching and synthetically valuable functionality on the electrophile. Radical trap experiments support the formation of electrophile-derived radicals during catalysis.
Nickel-Catalyzed Regioselective Alkenylarylation of γ,δ-Alkenyl Ketones via Carbonyl Coordination
Aryal, Vivek,Dhungana, Roshan K.,Giri, Ramesh,Lakomy, Margaret G.,Niroula, Doleshwar,Sapkota, Rishi R.
supporting information, p. 19092 - 19096 (2021/08/09)
We disclose a nickel-catalyzed reaction, which enabled us to difunctionalize unactivated γ,δ-alkenes in ketones with alkenyl triflates and arylboronic esters. The reaction was made feasible by the use of 5-chloro-8-hydroxyquinoline as a ligand along with
Palladium-catalysed reactions of conjugated enyne oxiranes with organoborons: A diastereoselective method of the synthesis of 2,4,5-trienol derivatives
Ziyanak, F?rat,Ku?, Melih,Alkan-Karadeniz, Leman,Artok, Levent
, p. 3652 - 3662 (2018/05/25)
A palladium-catalysed reaction of conjugated enyne oxiranes with organoboron reagents is described. This method allows aryl-substituted vinylallenes containing a hydroxyl group on the allylic position to be synthesized, with good diastereomeric ratios, un
Direct Borylation of Tertiary Anilines via C-N Bond Activation
Cao, Zhi-Chao,Li, Xiao-Lei,Luo, Qin-Yu,Fang, Huayi,Shi, Zhang-Jie
, p. 1995 - 1998 (2018/04/16)
The first successful catalytic borylation of unactivated aromatic C-N bonds of tertiary anilines without the preactivation or any directing groups is demonstrated. The reactivity of both N,N-dialkylarylamines and N-arylpyrroles were investigated systematically, and the targeted products were furnished in moderate to good yields. The DFT calculation results indicated that the catalytic cycle is furnished via a five-membered cyclic transition-state due to the steric hindrance of the Ni/NHC catalytic system.
Ruthenium-Catalyzed Ortho C-H Arylation of Aromatic Nitriles with Arylboronates and Observation of Partial Para Arylation
Koseki, Yuta,Kitazawa, Kentaroh,Miyake, Masashi,Kochi, Takuya,Kakiuchi, Fumitoshi
, p. 6503 - 6510 (2017/07/15)
Ruthenium-catalyzed C-H arylation of aromatic nitriles with arylboronates is described. The use of RuH2(CO){P(4-MeC6H4)3}3 as a catalyst provided higher yields of the ortho arylation products than the
Nickel-Catalyzed Borylation of Aryl and Benzyl 2-Pyridyl Ethers: A Method for Converting a Robust ortho-Directing Group
Tobisu, Mamoru,Zhao, Jiangning,Kinuta, Hirotaka,Furukawa, Takayuki,Igarashi, Takuya,Chatani, Naoto
supporting information, p. 2417 - 2421 (2016/08/16)
The nickel-catalyzed borylation of aryl 2-pyridyl ethers via the loss of a 2-pyridyloxy group is described. This method allows a 2-pyridyloxy group to be used as a convertible directing group in C?H bond functionalization reactions. The nickel catalyst can also borylate arylmethyl 2-pyridyl ethers, in which the stereochemistry at the benzylic position is retained in the case of chiral secondary benzylic substrates. (Figure presented.).
Nickel-Catalyzed Decarbonylative Borylation and Silylation of Esters
Pu, Xinghui,Hu, Jiefeng,Zhao, Yue,Shi, Zhuangzhi
, p. 6692 - 6698 (2016/10/18)
The nickel-catalyzed direct borylation and silylation of phenolic esters has been established. The key to this highly efficient acyl C-O bond borylative and silylative cleavage depends on the appropriate choice of different ligands and additives in the pr
Nickel-Catalyzed Decarbonylative Borylation of Amides: Evidence for Acyl C?N Bond Activation
Hu, Jiefeng,Zhao, Yue,Liu, Jingjing,Zhang, Yemin,Shi, Zhuangzhi
supporting information, p. 8718 - 8722 (2016/07/21)
A nickel/N-heterocyclic carbene catalytic system has been established for decarbonylative borylation of amides with B2nep2by C?N bond activation. This transformation shows good functional-group compatibility and can serve as a powerful synthetic tool for late-stage borylation of amide groups in complex compounds. More importantly, as a key intermediate, the structure of an acyl nickel complex was first confirmed by X-ray analysis. Furthermore, the decarbonylative process was also observed. These findings confirm the key mechanistic features of the acyl C?N bond activation process.
Ni-Catalyzed Borylation of Aryl Fluorides via C-F Cleavage
Liu, Xiang-Wei,Echavarren, Javier,Zarate, Cayetana,Martin, Ruben
supporting information, p. 12470 - 12473 (2015/10/19)
A Ni-catalyzed borylation via C-F activation is described. This protocol is distinguished by a wide scope, including unactivated fluoroarenes, without compromising its efficiency and scalability, thus representing a significant step-forward toward the implementation of C-F activation protocols.
Ipso- borylation of aryl ethers via Ni-Catalyzed C-OMe Cleavage
Zarate, Cayetana,Manzano, Rubén,Martin, Ruben
supporting information, p. 6754 - 6757 (2015/06/16)
A Ni-catalyzed ipso-borylation of aryl ethers via C(sp2)-OMe and C(sp3)-OMe cleavage is described. The transformation is characterized by its wide substrate scope under mild conditions and an exquisite divergence in site selectivity that can be easily switched by selecting the appropriate boron reagent.
