A functionalized alkyldiphenylphosphine as an efficient and mild reagent in carbon tetrachloride-promoted substitution reactions: kinetics and mechanism of the reaction in chloroform
Catalyst- and solvent-free hydrophosphination and multicomponent hydrothiophosphination of alkenes and alkynes
作者:Yanina Moglie、María José González-Soria、Iris Martín-García、Gabriel Radivoy、Francisco Alonso
DOI:10.1039/c6gc00903d
日期:——
The hydrophosphination of carbon-carbon multiple bonds has been generally performed under acid, base or metal catalysis in different solvents. Herein, alkyl and alkenyl tertiary phosphines are obtained by the addition...
A Broadly Applicable Strategy for Entry into Homogeneous Nickel(0) Catalysts from Air-Stable Nickel(II) Complexes
作者:Eric A. Standley、Stacey J. Smith、Peter Müller、Timothy F. Jamison
DOI:10.1021/om500156q
日期:2014.4.28
A series of air-stable nickel complexes of the form L2Ni(aryl) X (L = monodentate phosphine, X = Cl, Br) and LNi(aryl)X (L = bis-phosphine) have been synthesized and are presented as a library of precatalysts suitable for a wide variety of nickel-catalyzed transformations. These complexes are easily synthesized from low-cost NiCl2·6H2O or NiBr2·3H2O and the desired ligand followed by addition of 1
已经合成了一系列 L 2 Ni(芳基)X(L = 单齿膦,X = Cl,Br)和 LNi(芳基)X(L = 双膦)形式的空气稳定镍配合物,并表示为适用于各种镍催化转化的预催化剂库。这些配合物很容易由低成本的 NiCl 2 ·6H 2 O 或 NiBr 2 ·3H 2合成O 和所需的配体,然后加入 1 当量的格氏试剂。选择的这些配合物通过单晶 X 射线衍射进行了表征,并提供了对其结构特征的分析。介绍了将它们用作镍催化羰基-烯反应的预催化剂的案例研究,与使用 Ni(cod) 2 的反应相比,显示出优异的反应性。此外,由于预催化剂都对空气稳定,因此不需要手套箱或惰性气氛技术来利用这些配合物进行镍催化反应。
Tin-catalyzed hydrophosphination of alkenes
作者:John P. W. Stelmach、Christine A. Bange、Rory Waterman
DOI:10.1039/c5dt04272k
日期:——
Simple tin derivatives, Cp*2SnCl2 (1) and Ph2SnCl2 (2), catalyze the hydrophosphination of alkene substrates with diphenylphosphine. Competitive dehydrocoupling to give Ph4P2 was observed, but this side reaction can be mitigated when the catalysis is conducted under an H2 atmosphere. Efforts to prepare stable tinbis(phosphido) compounds commonly resulted in decomposition to Ph4P2. Lewis acidic inorganic
简单的锡衍生物Cp * 2 SnCl 2(1)和Ph 2 SnCl 2(2)催化烯烃与二苯基膦的加氢磷酸化。观察到竞争性的脱氢偶联得到Ph 4 P 2,但是当在H 2气氛下进行催化时,该副反应可以减轻。制备稳定的双(锡)双锡锡化合物的努力通常导致分解为Ph 4 P 2。路易斯酸性无机锡化合物不显示脱氢偶联反应性。发现路易斯酸B(C 6 F 5)如图3所示,其能够进行烯烃的加氢磷酸化,但是在测试条件下效果较差。
Iron catalysis for the synthesis of ligands: Exploring the products of hydrophosphination as ligands in cross-coupling
作者:Maialen Espinal-Viguri、Mary F. Mahon、Simon N.G. Tyler、Ruth L. Webster
DOI:10.1016/j.tet.2016.11.058
日期:2017.1
Catalytic hydrophosphination is a useful technique for the synthesis of phosphines, however, the phosphine products have been little exploited as ligands in catalysis. We have selected three phosphines prepared by iron catalyzed hydrophosphination and used them as ligands in a series of cross-coupling reactions: Heck, Suzuki-Miyaura and Buchwald-Hartwig. Rather than limit the chemistry to simple cross-coupling
The development of phosphinoamine-Pd(II)-imidazole complexes: implications in room-temperature Suzuki-Miyauracross-coupling reaction
作者:Geetika Borah、Devajani Boruah、Gayatri Sarmah、Saitanya K. Bharadwaj、Utpal Bora
DOI:10.1002/aoc.3029
日期:2013.12
The reaction of N‐methylimidazole (N‐MeIm) and N‐butylimidazole (N‐BuIm) with the complexes [PdCl2(PPh2py–P,N)] and [PdCl2(PPh2Etpy–P,N)] in the presence of NH4PF6 under N2 at room temperature afforded four new cationic Pd(II) complexes [PdCl(PPh2py–P,N)(N‐MeIm)](PF6) (1), [PdCl(PPh2py–P,N)(N‐BuIm)](PF6) (2), [PdCl(PPh2Etpy–P,N)(N‐MeIm)](PF6) (4) and [PdCl(PPh2Etpy‐P,N)(N‐BuIm)](PF6) (5) in good yields