32119-42-9Relevant academic research and scientific papers
Ligand-Controlled, Tunable Copper-Catalyzed Radical Divergent Trifluoromethylation of Unactivated Cycloalkenes
Wang, Qi,Zang, Zhong-Lin,Jie, Mi,Luo, Li-Hua,Yang, Dan,Zhou, Cheng-He,Cai, Gui-Xin
supporting information, p. 5284 - 5291 (2021/10/25)
The Cu-catalyzed high-chemoselective trifluoromethylation reactions of unactivated cycloalkenes via the modulation of appropriate ligands have been explored. The Cu(I)/appropriate ligands-catalytic systems overcome the key challenge in differentiating two pathways involving radical intermediates and provide a ligand-controlled approach for site-specific spiro-aryltrifluoromethylation and chlorotrifluoromethylation to afford trifluoromethylated spiro-tetrahydroquinoline compounds and vicinal Cl-containing trifluoromethyl cycloalkanes. Moreover, compared with reported chlorine sources, 1,2-dichloroethane is used as more green and economical feedstock for chlorotrifluoromethylation. (Figure presented.).
Stereospecific Electrophilic Fluorocyclization of α,β-Unsaturated Amides with Selectfluor
Fei, Haiyang,Fu, Yao,Jalani, Hitesh B.,Li, Guigen,Lu, Hongjian,Wu, Hongmiao,Xu, Zheyuan,Zhu, Lin
, (2020/03/30)
An efficient fluorocyclization of α,β-unsaturated amides through a formal halocyclization process is developed. The reaction proceeds under transition-metal-free conditions and leads to the formation of fluorinated oxazolidine-2,4-diones with excellent regio- and diastereoselectivity. The evaluation of the reaction mechanism based on preliminary experiments and density functional theory calculations suggests that a synergetic syn-oxo-fluorination occurs and is followed by an anti-oxo substitution reaction. The reaction opens a new window in the field of stereospecific fluorofunctionalization.
Pd-Catalyzed Carbonylation of Vinyl Triflates to Afford α,β-Unsaturated Aldehydes, Esters, and Amides under Mild Conditions
Zhang, Shaoke,Neumann, Helfried,Beller, Matthias
supporting information, p. 3528 - 3532 (2019/05/24)
An efficient and general protocol for the synthesis of α,β-unsaturated aldehydes, esters, and amides via carbonylation of vinyl triflates including derivatives of camphor, ketoisophorone, verbenone, and pulegone was developed. Crucial for these transformations is the use of a specific palladium catalyst containing a pyridyl-substituted dtbpx-type ligand. This procedure also allows for an easy access of dicarbonylated products from the corresponding ketones.
Direct annulations toward phosphorylated oxindoles: Silver-catalyzed carbon-phosphorus functionalization of alkenes
Li, Ya-Min,Sun, Meng,Wang, Hong-Li,Tian, Qiu-Ping,Yang, Shang-Dong
supporting information, p. 3972 - 3976 (2013/05/09)
Silver screen: The AgNO3-catalyzed carbon phosphorylation of alkenes occurs by an alkene addition/cyclization cascade. Ag+ reacts with Ph2P(O)H to form the crucial active intermediate 1, which promotes the reaction. This method requires a cheap, nontoxic silver salt as the catalyst and substrates for the transformation are simple and readily accessible.
Metal-free synthesis of 3,3-disubstituted oxoindoles by iodine(III)-catalyzed bromocarbocyclizations
Fabry, David C.,Stodulski, MacIej,Hoerner, Stefanie,Gulder, Tanja
supporting information; experimental part, p. 10834 - 10838 (2012/09/10)
"I" did it: An iodine(III)-mediated bromocarbocyclization was elaborated as an efficient tool for the synthesis of oxoindoles. This method is applicable to a variety of structurally different substrates, also with chemically sensitive groups, and gives access to the heterocycles in a regio- and stereoselective fashion (see scheme). The indole-2-ones obtained can be converted easily into structurally complex target compounds, such as the alkaloid physostigmine. Copyright
Systematic study on the catalytic synthesis of unsaturated 2-ketocarboxamides: Palladium-catalyzed double carbonylation of 1-iodocyclohexene
Carrilho, Rui M.B.,Pereira, Mariette M.,Takács, Attila,Kollár, László
experimental part, p. 204 - 207 (2012/01/05)
1-Iodocyclohexene, a benchmark substrate, has been double carbonylated in the presence of palladium-phosphite precatalysts. Triarylphosphites with OR substituents, able to act both as P-monodentate and hemilabile P,O-heterobidentate ligands were used in t
Palladium catalyzed alkoxy- and aminocarbonylation of vinyl tosylates
Reeves, Diana C.,Rodriguez, Sonia,Lee, Heewon,Haddad, Nizar,Krishnamurthy, Dhileepkumar,Senanayake, Chris H.
supporting information; experimental part, p. 2495 - 2497 (2011/06/25)
Chemical equations presented. The palladium catalyzed alkoxycarbonylation and aminocarbonylation of vinyl tosylates are described. A variety of ketone and aldehyde derived vinyl tosylates may be carbonylated in the presence of primary, secondary, and tert
