The present study discusses the behaviour of fluorinated azoxybenzenes in strong acids. 2,2′,3,3′,5,5′,6,6′-Octafluoro- azoxybenzene I reacted with chlorosulphonicacid giving the Wallach rearrangement product, the chlorosulphonate ester of 4-hydroxy-2,2′,3,3′,5,5′,6,6′-octafluoroazobenzene. In HF, H2SO4 and HSO3F compound I was stable, whereas in SbF5-HSO3F (1:1) at 20 °C, it gave quantitatively the
本研究讨论了氟化a氧基苯在强酸中的行为。2,2',3,3',5,5',6,6'-八氟-甲氧基苯I与氯磺酸反应生成Wallach重排产物,即4-羟基-2,2',3,3的氯磺酸酯',5,5',6,6'-八氟偶氮苯。在HF中,H 2 SO 4和HSO 3 F化合物I是稳定的,而在20°C下的SbF 5 -HSO 3 F(1:1)中,定量给出了还原产物2.2,3.3,5.5 ',6,6'-八氟偶氮苯。使用1 H,13 C,15 N和191 H NMR,我们研究了用强酸处理从氟化a氧基苯产生的阳离子型物质。这些物质在Wallach重排和偶氮苯形成中的作用已得到检验。在HSO 3 Cl中,发生CN键的断裂,在十氟az氧基苯的情况下,导致五氟氯苯和五氟苯基重氮阳离子。建议该反应的途径。
Organozinc reagents from polyfluoroarenes: Preparation and reactions with allyl halides. Synthesis of allylpolyfluoroarenes
作者:A. S. Vinogradov、V. I. Krasnov、V. E. Platonov
DOI:10.1134/s1070428008010119
日期:2008.1
Organozinc compounds of the general formula ArFZnX (X = Cl, ArF) were synthesized by reactions of Zn with chloropolyfluoroarenes and of Zn/SnCl2 with polyfluoroarenes. Polyflorinated organozinc compounds reacted with allyl chloride and allyl bromide to give the corresponding allyl-substituted polyfluoroarenes. The reactions with allyl chloride were carried out in the presence of copper(I) salts (CuCl or CuI).
Olefin polymerization catalyst system useful for polar monomers
申请人:Baugh Sauders Lisa
公开号:US20070197751A1
公开(公告)日:2007-08-23
This invention relates to copolymers produced by a polymerization method comprising contacting at least one olefin monomer, at least one polar monomer, an optional activator, and a catalyst compound represented by the formula:
wherein M is selected from groups 3-11 of the periodic table;
L
1
represents a formal anionic ligand, L
2
represents a formal neutral ligand, a is an integer greater than or equal to 1; b is greater than or equal to 0; c is greater than or equal to 1,
E is nitrogen or phosphorus, Ar
0
is arene, R
1
-R
4
are, each independently, selected from hydrogen, hydrocarbyl, substituted hydrocarbyl or functional group, provided however that R
3
and R
4
do not form a naphthyl ring, N is nitrogen and O is oxygen.
The present invention refers to novel ruthenium- and osmium-based catalysts for olefin metathesis reactions, particularly to catalysts having stereoselective properties. Z-selectivity is obtained by utilising two mono-anionic ligands of very different steric requirement. In olefin metathesis reactions these catalysts selectively provide the Z-isomer of disubstituted olefinic products even in presence of air or of acids.
Aniline derivatives such as those represented by the formula shown, for example, have good solubility with respect to organic solvents, and are able to provide an organic electroluminescent element having excellent luminance characteristics when a thin film containing said aniline derivatives is used as a charge transporting substance in a hole injection layer.
(In the formula, DPA represents a diphenylamino group.)