- A ferrocene diphosphine ligand preparation method
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The invention discloses a method for preparing ferrocene diphosphine ligand, and belongs to the field of organic synthesis. The method comprises the following steps: by taking ferrocene as an initial raw material and boron trifluoride diethyl etherate as a catalyst, reacting with diaryl phosphine oxide or dialkyl phosphine oxide, hydrolyzing so as to obtain tertfluoborate of a ferrocene diphosphine compound, and performing heating backflow deprotection in methanol, thereby obtaining the ferrocene diphosphine compound. Compared with the prior art, the method is gentle in reaction condition, simple in aftertreatment, and relatively applicable to industrial production, and the yield is greater than 90%. The prepared ferrocene diphosphine can be used as ligand of a metal catalyst, and can be used in the fields such as organic optoelectronic materials and medicines.
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Paragraph 0006; 0017; 0018
(2017/08/31)
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- Structure of the hydrogenation catalyst [(P P)Rh(NBD)]ClO4, P P = (η5-[(CH3)3C]2PC 5H4)2Fe, and some comparative rate studies
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The structure of the hydrogenation catalyst precursor [(P P)Rh(NBD)]ClO4 [P P = (η5-[(CH3)3C]2PC 5H4)2Fe; NBD = norbornadiene] has been determined. The cationic moiety finds Rh in a very distorted square-planar environment coordinated to the double bonds of the norbornadiene ligand at distances of 2.181 (5) and 2.161 (5) A? and the phosphorus atoms of the bidentate chelating phosphine ligand at distances of 2.466 (1) and 2.458 (1) A?. Relative rate studies, employing the aforementioned catalyst precursor and also the related precursor where P P = (η5-[(C6H5)2PC5H 4]2Fe), have been performed for the hydrogenation reactions of (acylamino)acrylic, (acylamino)cinnamic, itaconic, and methylcinnamic acids in methanol and/or ethanol. The results of these experiments, together with related work previously reported, are discussed and rationalized in terms of the steric and electronic effects exerted by the substituents attached to the chelating bis(phosphine) ligands.
- Cullen, William R.,Kim, Tae-Jeong,Einstein, Frederick W. B.,Jones, Terry
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p. 714 - 719
(2008/10/08)
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