1015-53-8Relevant academic research and scientific papers
1,2-AZABORINE COMPOUNDS AND SYNTHESIS
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Page/Page column 15-16, (2014/02/16)
A compound, or a pharmaceutically acceptable salt or ester thereof, having a structure of formula (I), wherein R1 is a substituted aryl or an optionally-substituted heteroaryl, provided that the heteroaryl is not pyridyl or azaborine; and each
Rhodium-catalyzed boron arylation of 1,2-azaborines
Rudebusch, Gabriel E.,Zakharov, Lev N.,Liu, Shih-Yuan
supporting information, p. 9316 - 9319 (2013/09/12)
A Sn-phony in B! BN isosteres of biphenyl compounds are prepared through Rh-catalyzed cross-coupling between 2-chloro-1,2-azaborines and arylstannanes (see scheme). The synthetic method should enable investigations of structure-activity relationships (SAR
Synthesis and study of new cyclic boronate additives for lithium battery electrolytes
Lee,Sun,Yang,McBreen
, p. A1460-A1465 (2008/10/08)
Two novel boronate compounds, 2-(pentafluorophenyl)-tetrafluoro-1,3,2-benzodioxaborole (1) and 2-(pentafluorophenyl)-4,4,5,5-tetrakis(trifluoromethyl)-1,3,2-dioxaborolane (2), have been synthesized as additives for lithium battery electrolytes. These cyclic boronate compounds have a much more significant effect on conductivity enhancement of LiF salt in dimethoxyethene (DME) or ethyl carbonate-dimethyl carbonate (EC-DMC) than either borane or borate additives we previously synthesized. The conductivity of a composite electrolyte containing compound 1 and LiF has reached 9.54 × 10-3 S/cm in DME and 4.79 × 10-3 S/cm in EC-DMC (1:2). This is due to the lower molecular weight and less steric hindrance effects of compound 1. In the case of compound 2, the enhanced performance also comes from the improved solubility in polar solvents. Composite electrolytes containing LiF and either compound 1 or compound 2 have excellent electrochemical stability in the EC-DMC solvent, with respective electrochemical windows of 4.05 and 5.1 V. The composite electrolyte containing LiF and compound 2 shows high cycling efficiency and cyclability in both Li/LiMn2O4 and Li/LiNi0.8Co0.2O2 cells.
Preparatiions of chloro(diene)polyfluorophenylplatinum(II) complexes and the structure of chloro(dicyclopentadiene)-pentafluorophenylplatinum(II)
Deacon,Gatehouse,Nelson-Reed
, p. 267 - 283 (2007/10/02)
The complexes, PtCl(diene)R (diene = hexa-1,5-diene (hex) or norbornadiene (nbd), R C6F5, p-HC6F4, or p-MeOC6F4; diene = diene = dicyclopentadiene (dcy), R = C6F5) have been prepared by reaction between equimolar amounts of PtCl2(diene) and Me3SnR in dichloromethane. Most reactions also gave some of the corresponding PtR2(diene) complex, which was readily separated by chromatography, and Pt(p-MeOC6F4)2(nbd) was obtained in high yield from PtCl2(nbd) and Me3Sn(p-MeOC6F4) when a 1 2 mole ratio was used. Attempts to prepare PtCl(dcy)R (R p-HC6F4 or p-MeOC6F4) from Me3SnR gave only PtR2(dcy) in boiling CH2Cl2 despite the use of 1 1 reactant stoichiometry, and Pt(p-MeOC6F4)2(dcy) or no reaction (R p-HC6F4) at room temperature. Alternative reagents, R′3 SnR (R′ Bu or Et, R C6F5 or p-MeOC6F4) had a variable effect on the selectivity of monoarylation. Thus, Bu3SnC6F5 was more selective and Et3SnC6F5 less selective in formation of PtCl(hex)C6F5 than Me3SnC6F5. With Et3SnR (R C6F5 or p-MeOC6F4) and an equimolar amount of PtCl2(dcy), PtCl(dcy)R was the major product. The crystal structure of ptCl(dcy)C6F5 shows near square planar stereochemistry for platinum and steric congestion. The double bond from the six-membered ring of dcy is unsymmetrically coordinated to platinum trans to C6F5 and is further from the metal than the other double bond, which is symmetrically bonded trans to chlorine. The pentafluorophenyl group is approximately normal to the coordination plane, and gives two ortho-fluorine resonances in the 19F NMR spectrum.
Aromatic reactivity. XXXIV. The acid cleavage of (pentafluorophenyl)-trimethyl-stannane and -silane
Eaborn,Treverton,Walton
, p. 259 - 262 (2008/10/08)
The rates of acid cleavage of (pentafluorophenyl)trimethyl-stannane and -silane have been measured. For the first compound the rate is markedly larger than would be expected for additivity of the deactivating effects of the five fluorine atoms separately.
