271600-96-5Relevant academic research and scientific papers
Unprecedented Asymmetric Epoxidation of Isolated Carbon–Carbon Double Bonds by a Chiral Fluorous Fe(III) Salen Complex: Exploiting Fluorophilic Effect for Catalyst Design
Kobayashi, Yuki,Obayashi, Riho,Watanabe, Yuki,Miyazaki, Hiroki,Miyata, Issei,Suzuki, Yuta,Yoshida, Yukihiro,Shioiri, Takayuki,Matsugi, Masato
supporting information, p. 2401 - 2408 (2019/03/26)
The first asymmetric epoxidation of isolated carbon–carbon double bonds by a chiral salen complex using ubiquitous Fe(III) as a center-metal is described. By simultaneously introducing fluorous tags and tert-butyl groups into the ligand of the salen compl
Bismuth trichloride–mediated cleavage of phenolic methoxymethyl ethers
Obaro-Best, Oghale,Reed, Jack,Norfadilah, Alya A. F. B.,Monahan, Ryan,Sunasee, Rajesh
supporting information, p. 586 - 593 (2016/06/08)
A simple and efficient method for removal of phenolic methoxymethyl ethers in the presence of 30?mol% of bismuth trichloride in acetonitrile/water is described. Notable features of the cleavage protocol entail use of an ecofriendly bismuth reagent, ease of handling, low cost, operational simplicity, and good functional group compatibility. A number of structurally varied phenolic methoxymethyl ethers were cleaved in good to excellent yields.
Visible-light-triggered direct benzoyloxylation of electron-rich arenes at room temperature without chelation assistance
Rao, Honghua,Wang, Ping,Li, Chao-Jun
supporting information, p. 6503 - 6507 (2013/01/15)
A RuII photocatalytic method was developed for the direct mono-benzoyloxylation of electron-rich aromatic and heteroaromatic systems even with an excess amount of benzoyl peroxide. The reaction was conducted at room temperature under visible light. The direct ArC-H benzoyloxylations occur without the assistance of any directing groups and can also tolerate various functional groups that have already shown diverse reactivities in transition-metal catalysis.
Synthetic approaches to mixed ligand chelators on tert-butylphenol- formaldehyde oligomer (PFO) platforms
Young, Jennifer A.,Karmakar, Sukhen,Jacobs, Hollie K.,Gopalan, Aravamudan S.
, p. 10030 - 10039,10 (2012/12/12)
Synthetic approaches to mixed ligand chelators on readily available tert-butylphenol-formaldehyde oligomer, PFO, scaffolds were examined. In a promising approach, tris and tetraphenol oligomers were selectively mono or di protected using tert-butyldiphenyl silyl chloride. The utility of these protected intermediates to prepare representative mixed PFO chelators, carrying ligands such as hydroxamic acid, 3,2-hydroxypyridinones, and others was then demonstrated. The introduction of the ligand tethers onto the phenolic scaffold can be done sequentially under relatively mild conditions that tolerate the presence of other sensitive ligand groups. The differential reactivity of the disilyl derivative 20b, allowed stepwise introduction of two different ligands on the internal phenolic positions. This enabled the introduction of three different ligand groups of choice onto the tetraphenol platform.
Ethylene polymerization characteristics of an electron-deficient nickel(II) phenoxyiminato catalyst modulated by non-innocent intramolecular hydrogen bonding
Delferro, Massimiliano,McInnis, Jennifer P.,Marks, Tobin J.
experimental part, p. 5040 - 5049 (2011/01/06)
The synthesis and characterization of the neutrally charged electron-deficient nickel(II) phenoxyiminato catalyst {2-(hydroxydiphenylmethyl) -4-tert-butyl-[6-(2,6-diisopropylphenyl)]salicylaldiminato} methyl(trimethylphosphine)nickel(II) (1b) with an intr
Complexes of phosphine-phenolate ligands with the [Re=O]3+ and [Re(HNNC5H4N)(NNC5H4N)] 2+ cores
Kovacs,Hein,Sattarzadeh,Patrick,Emge,Orvig
, p. 3015 - 3024 (2007/10/03)
Complexes incorporating the [Re=O]3+ core have been synthesised with ligands containing the new methyl substituted phosphine - Phenolate PO and PO2 donor sets, (2-hydroxy-5-methylphenyl)diphenylphosphine (H(MePO)) and bis(2-hydroxy-5
PHOSPHORUS-CONTAINING PODANDS. 7. COMPLEXING PROPERTIES OF ortho-DIPHENYLPHOSPHINYL-SUBSTITUTED DIPHENYL ETHERS OF OLIGOETHYLENE GLYCOLS WITH RESPECT TO ALKALI-METAL CATIONS
Evreinov, V. I.,Baulin, V. E.,Vostroknutova, Z. N.,Safronova, Z. V.,Krashakova, I. B.,et al.
, p. 1759 - 1766 (2007/10/02)
Stability constants of complexes of alkali-metal cations with oligoethylene glycol diethers RO(CH2CH2O)nR (n = 1-5), where R = 2-Ph2P(O)C6H4 and 2-Ph2(O)-4-t-BuC6H3P, have been determined conductometically in a tetrahydrofuran-chloroform mixture (4:1 by volume).The dependence of complexing ability on a number of monopodand donor centers for Li+ and Na+ has multiple extrema.For K+, Rb+, and Cs+ the complexing abilities steadily increase with the length of the ligand polyether chain.Monopodands based on triethylene glycol and its pyrocatechol analog are highly effective (log K = 6.7-7.0) with respect to Li+.The synthesis of ligands with a lipophilic tert-butyl substituent in the terminal group is described.
