Xanthene-Phosphole Ligands: Synthesis, Coordination Chemistry, and Activity in the Palladium-Catalyzed Amine Allylation
作者:Guilhem Mora、Bernard Deschamps、Steven van Zutphen、Xavier F. Le Goff、Louis Ricard、Pascal Le Floch
DOI:10.1021/om061172t
日期:2007.4.1
5-triphenylphosphole. Both ligands (DPP-Xantphos 3 for the diphenyl derivative and DMP-Xantphos 4 for the dimethyl derivative) react with [Pd(allyl)Cl]2 to afford the corresponding cationic complexes 5Cl and 6Cl. Using AgOTf, stable triflate complexes 5OTf and 6OTf could be isolated. The chloride complexes, on the other hand, exhibit a limited stability in solution. The DPP-Xantphos derivative 5Cl eliminates allyl
两个新的呫吨磷杂衍生物,3和4,分别通过氰基的亲核取代在合成1- P -氰基-2,5- diphenylphosphole(1)和1- P -氰基-3,4- dimethylphosphole(2)由9,9'-二甲基the吨的4,5-二锂盐形成。为此,开发了一种新的合成方法,其允许从1,2,5-三苯基磷脂合成所需的1 - P-氰基-2,5-二苯基磷脂。两个配体(二苯基衍生物的DPP-Xantphos 3和二甲基衍生物的DMP-Xantphos 4)均与[Pd(烯丙基)Cl] 2反应得到相应的阳离子络合物5Cl和6Cl。使用AgOTf,可以分离稳定的三氟甲磺酸盐复合物5OTf和6OTf。另一方面,氯化物络合物在溶液中显示出有限的稳定性。DPP-Xantphos衍生物5Cl消除烯丙基氯,得到通式[Pd(3)] 2的二聚钯(0)配合物7,其中每个钯与相同配体的两个磷原子和一个双键配位第二配体的一
Synthesis, X-Ray, and Electronic Structures of a New Nickel Dibromide Complex. Activity in the Regioselective Catalyzed Dimerization of Ethylene into 1-Butene
作者:Guilhem Mora、Steven van Zutphen、Christian Klemps、Louis Ricard、Yves Jean、Pascal Le Floch
DOI:10.1021/ic701529a
日期:2007.11.1
[NiBr2(DME)] afforded a new nickel(II) dibromide complex, 2. Both its color and its NMR behavior change with temperature and solvent due to changes in the spin state of the complex. This led us to study the complex spin states using DFT calculations. Furthermore, the activity of 2 in catalyzed ethylene dimerization was studied, revealing both high activity and selectivity toward the production of 1-butene