777-22-0Relevant academic research and scientific papers
Iron(II)-Catalyzed Site-Selective Functionalization of Unactivated C(sp3)?H Bonds Guided by Alkoxyl Radicals
Guan, Honghao,Sun, Shutao,Mao, Ying,Chen, Lei,Lu, Ran,Huang, Jiancheng,Liu, Lei
supporting information, p. 11413 - 11417 (2018/08/28)
An alkoxyl radical guided strategy for site-selective functionalization of unactivated methylene and methine C?H bonds enabled by an FeII-catalyzed redox process is described. The mild, expeditious, and modular protocol allows efficient remote aliphatic fluorination, chlorination, amination, and alkynylation of structurally and electronically varied primary, secondary, and tertiary hydroperoxides with excellent functional-group tolerance. The application for one-pot 1,4-hydroxyl functionalization of non-oxygenated alkane substrates initiated by aerobic C?H oxygenation is also demonstrated.
Adsorption and catalytic properties of sulfated aluminum oxide modified with cobalt ions
Lanin,Bannykh,Vlasenko,Krotova,Obrezkov,Shilina
, p. 36 - 43 (2017/02/19)
The adsorption properties of sulfated aluminum oxide (9% SO4 2-/γ-Al2O3) and a cobalt-containing composite (0.5%Сo/SO4 2-/γ-Al2O3) based on it are studied via dynamic
Electron-Transfer and Hydride-Transfer Pathways in the Stoltz–Grubbs Reducing System (KOtBu/Et3SiH)
Smith, Andrew J.,Young, Allan,Rohrbach, Simon,O'Connor, Erin F.,Allison, Mark,Wang, Hong-Shuang,Poole, Darren L.,Tuttle, Tell,Murphy, John A.
, p. 13747 - 13751 (2017/10/12)
Recent studies by Stoltz, Grubbs et al. have shown that triethylsilane and potassium tert-butoxide react to form a highly attractive and versatile system that shows (reversible) silylation of arenes and heteroarenes as well as reductive cleavage of C?O bonds in aryl ethers and C?S bonds in aryl thioethers. Their extensive mechanistic studies indicate a complex network of reactions with a number of possible intermediates and mechanisms, but their reactions likely feature silyl radicals undergoing addition reactions and SH2 reactions. This paper focuses on the same system, but through computational and experimental studies, reports complementary facets of its chemistry based on a) single-electron transfer (SET), and b) hydride delivery reactions to arenes.
The thermofluoric behavior of poly(fluorenetolyldiphenylamine)-oxadiazole pair in a polymer matrix
Lee, Chin-Sheng,Kuo, Cheng-Po,Chang, Chiou-Ling,Chuang, Ching-Nan,Lee, Mandy M.,Sun, Shih-Sheng,Leung, Man-Kit
, p. 20227 - 20236 (2013/11/06)
Under UV irradiation, 1,4-bis(5-(4-octan-2-ylphenyl)-1,3,4-oxadiazol-2-yl) naphthalene (NOXD) and poly(fluorenetolyldiphenylamine) (PFT) are blue light emissive in solid film. When NOXD and PFT were blended to form a neat thin-film, yellowish exciplex emi
Iron-catalyzed cross-coupling of alkyl sulfonates with arylzinc reagents
Ito, Shingo,Fujiwara, Yu-Ichi,Nakamura, Eiichi,Nakamura, Masaharu
supporting information; experimental part, p. 4306 - 4309 (2009/12/26)
Iron-catalyzed cross-coupling reactions of primary and secondary alkyl sulfonates with arylzinc reagents proceed smoothly In the presence of excess TMEDA and a concomitant magnesium salt. The arylzinc reagents are prepared from the corresponding aryllithium or magnesium reagents with ZnI2. The In situ formation of alkyl Iodides and consecutive rapid cross-coupling avoids discrete preparation of the unstable secondary alkyl halides and also achieves high product selectivity.
Silver-catalyzed cross-coupling reactions of alkyl bromides with alkyl or aryl Grignard reagents
Someya, Hidenori,Yorimitsu, Hideki,Oshima, Koichiro
supporting information; experimental part, p. 3270 - 3272 (2009/08/09)
Treatment of secondary or tertiary alkyl bromides with alkyl Grignard reagents in the presence of catalytic amounts of silver bromide and potassium fluoride in CH2Cl2 afforded the corresponding cross-coupling products in reasonable yields. Moreover, silver showed catalytic activity for the cross-coupling reactions of alkyl bromides with aryl Grignard reagents.
Preparation, structure, and reactivity of nonstabilized organoiron compounds. Implications for iron-catalyzed cross coupling reactions
Fuerstner, Alois,Martin, Ruben,Krause, Helga,Seidel, Guenter,Goddard, Richard,Lehmann, Christian W.
, p. 8773 - 8787 (2008/12/23)
A series of unprecedented organoiron complexes of the formal oxidation states -2, 0, +1, +2, and +3 is presented, which are largely devoid of stabilizing ligands and, in part, also electronically unsaturated (14-, 16-, 17- and 18-electron counts). Specifically, it is shown that nucleophiles unable to undergo β-hydride elimination, such as MeLi, PhLi, or PhMgBr, rapidly reduce Fe(3+) to Fe(2+) and then exhaustively alkylate the metal center. The resulting homoleptic organoferrate complexes [(Me4Fe)(MeLi)] [Li(OEt2)]2 (3) and [Ph4Fe][Li(Et 2O)2][Li(1,4-dioxane)] (5) could be characterized by X-ray crystal structure analysis. However, these exceptionally sensitive compounds turned out to be only moderately nucleophilic, transferring their organic ligands to activated electrophiles only, while being unable to alkylate (hetero)aryl halides unless they are very electron deficient. In striking contrast, Grignard reagents bearing alkyl residues amenable to β-hydride elimination reduce FeXn (n = 2, 3) to clusters of the formal composition [Fe(MgX)2]n. The behavior of these intermetallic species can be emulated by structurally well-defined lithium ferrate complexes of the type [Fe(C2H4) 4][Li(tmeda)]2 (8), [Fe(cod)2][Li(dme)] 2 (9), [CpFe(C2H4)2][Li(tmeda)] (7), [CpFe(cod)][Li(dme)] (11), or [Cp*Fe(C2H4) 2][Li(tmeda)] (14). Such electron-rich complexes, which are distinguished by short intermetallic Fe-Li bonds, were shown to react with aryl chlorides and allyl halides; the structures and reactivity patterns of the resulting organoiron compounds provide first insights into the elementary steps of low valent iron-catalyzed cross coupling reactions of aryl, alkyl, allyl, benzyl, and propargyl halides with organomagnesium reagents. However, the acquired data suggest that such C-C bond formations can occur, a priori, along different catalytic cycles shuttling between metal centers of the formal oxidation states Fe(+1)/Fe(+3), Fe(0)/Fe(+2), and Fe(-2)/Fe(0). Since these different manifolds are likely interconnected, an unambiguous decision as to which redox cycle dominates in solution remains difficult, even though iron complexes of the lowest accessible formal oxidation states promote the reactions most effectively.
PROCESS FOR PRODUCTION OF AROMATIC COMPOUNDS
-
Page/Page column 24-25, (2010/11/24)
A problem of the present invention is to provide an economical process with minimized toxicity for producing an aromatic compound having a variety of substituents such as various alkyl groups, and the problem is solved by a process for production of an aromatic compound represented by formula (1) below, which comprises reacting a compound represented by formula (2) below with an aromatic magnesium reagent represented by formula (3a) below in the presence of an iron catalyst and a diamine compound: wherein R is an optionally substituted hydrocarbon group or a C 3 - C 10 saturated or unsaturated ring group; A is an optionally substituted C 4 - C 20 aromatic group or an optionally substituted heteroaromatic group; X is a halogen atom or a sulfonic acid ester; and Y 1 is bromine, iodine, chlorine or a carbanion ligand.
Method for formulation of synthetic gas oils or additives for gas oil
-
Page/Page column 2, (2008/06/13)
The invention relates to a method for formulation of a synthetic gas oil or an additive for gas oil in which an alkyl-aromatic compound or a mixture of alkyl-aromatic compounds is selected based on at least one parameter that is selected from the group that consists of the number of cycles of the aromatic core, the number of alkyl chains that are grafted to the aromatic cycle, the length of the alkyl chain or chains, the position of the aromatic cycle or cycles on the alkyl chain or chains of said alkyl-aromatic compound or compounds such that the cetane number of the synthetic gas oil or the additive for gas oil is greater than 30. The invention also relates to a process for the production of alkyl-aromatic compounds for use as a gas oil or additive.
23Na, 29Si, 27Al and 1H MASNMR investigations of rare earth exchanged NaFAU-Y zeolite and vapour phase alkylation of benzene with 1-octene
Thomas, Bejoy,Sugunan
, p. 2503 - 2513 (2007/10/03)
Rare earth exchanged NaFAU-Y zeolites have been prepared by simple ion-exchange methods under moderate conditions. We have investigated the effect of rare earth cations in the textural and structural properties of modified NaFAU-Y zeolite. 23Na
