共查询到18条相似文献,搜索用时 93 毫秒
1.
室温离子液体中水溶性铑膦配合物催化1-己烯氢甲酰化反应的研究 总被引:2,自引:0,他引:2
研究了水溶性膦配体铑配合物在若干离子液体中的1-己烯氢甲酰化反应性能.通过改变离子液体的阴阳离子结构,可使水溶性TPPTS-铑配合物在离子液体中表现出较高的卜己烯氢甲酰化反应活性和选择性;在[BMI]BF4离子液体中加入适量的水,可提高TPPTS-铑配合物的催化活性;在[BMI]BF4离子液体中,水/有机两亲性膦配体与铑形成的配合物,反应后催化剂与产物自动分层,实现催化剂的循环使用.本文结果表明,水溶性膦配体铑配合物的催化活性与其在离子液体中的溶解度密切相关. 相似文献
2.
在氢气压力下,钌配合物[^MeCnRuCl(dppe)](O3SCF3)与AgO3SC3在CH2Cl2中反应生成分子氢配合物[^MeCnRu(H2)(dppe)](O3SCF3)2,该分子氢配合物具有催化烯烃离子氢化的活性。原位高压核磁共振研究显示,这种催化离子氢化反应可能是由分子氢配合物向烯烃转移氢质子形成碳正离子引起的。 相似文献
4.
5.
6.
7.
C60与正丙胺反应,然后分别与氯亚铂酸钾或三氯化铑配合,制得出含配位氮原子的富勒烯铂,铑 配合物,它们均能有效地催化烯烃与三乙氧基硅烷硅氢加成,铂配合物还对苯乙烯有独特的催化性能,以近100%的区域选择性得到α-加成产物,对催化机理进行了初步的探讨。 相似文献
8.
有机硅材料是一种功能独特,性能优异的化工新材料,广泛应用于工业、农业、医药等各大领域。其种类繁多,如硅油、硅橡胶、硅树脂、硅烷等,它们的主要成分均为有机硅化合物,且均非自然界中存在的天然物质,需人工合成。目前,烯烃硅氢化反应是制备有机硅化合物的重要方法之一。该方法简单而直接,且具有原子经济性,备受人们的亲睐。这类反应需要在催化剂的作用下才能发生,因而过渡金属催化剂的设计和机理的研究一直为实验和理论工作者所关注。本文综述了近年来过渡金属配合物催化剂及其催化烯烃硅氢化反应的机理。重点介绍了Pt、Rh、Ru、Zr等过渡金属配合物的不同催化作用机制,希望为以后的研究提供思路和启发。 相似文献
9.
10.
二茂铁衍生物的金属配合物对于氢化、偶联及不对称合成的催化作用已有报道,但用于烯烃硅氢加成还只有关于手征性二茂铁膦钯配合物和聚合物负载二茂铁膦钯、膦铂配合物的研究。Macosko等曾用顺式二氯化双乙硫醚铂配合物催化聚异丁烯末端双键进行硅氢加成,我们也发现聚-4-氧杂-6,7-双甲硫基庚基硅氧烷铂配合物对于烯烃的硅氢加成反应具有良好的催化活性。因此,预期1,1′-双烷硫基二茂铁铂、铑配合物也应是烯烃硅氢加成的有效催化剂。 相似文献
11.
The addition of triethylsilane to O- and S- heterocyclic Schiff bases in the presence of Rh, Pd, Pt, and Ir complexes has been studied. A series of the corresponding amines has been synthesized using the most active catalysts, which were the dimeric, monovalent complexes [Rh(1,5-cyclooctadiene)Cl]2 and [Pd(allyl)Cl]2. 相似文献
12.
13.
The hydroformylation of 1-hexene catalyzed by rhodium-TPPTS complexes in the ionic liquid [bmim]BF4 was studied. The activity and selectivity of the rhodium-TPPTS complexes in [bmim]BF4 were much higher than those reported in other ionic liquids. The TOF of 1-hexene and selectivity for aldehyde were 1508 h-1 and 92%, respectively, under the optimum conditions. The high activity of the catalyst is ascribed to the absence of halide ions as well as the much higher solubility of hydrogen and rhodium-TPPTS complexes in [bmim]BF4 than in [bmim]PF6. 相似文献
14.
15.
Transfer Hydrogenation of Ketones Catalyzed by Surface‐Active Ruthenium and Rhodium Complexes in Water
下载免费PDF全文
![点击此处可从《Chemistry (Weinheim an der Bergstrasse, Germany)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Dr. Alexander M. Kalsin Dr. Tat'yana A. Peganova Dr. Valentin V. Novikov Alexandra I. Zhamoytina Dr. Luca Gonsalvi Dr. Maurizio Peruzzini 《Chemistry (Weinheim an der Bergstrasse, Germany)》2014,20(3):846-854
An improved, high‐yield, one‐pot synthetic procedure for water‐soluble ligands functionalized with trialkyl ammonium side groups H2N(CH2)2NHSO2‐p‐C6H4CH2[NMe2(CnH2n+1)]+ ( [HL n ]+ ; n=8, 16) was developed. The corresponding new surface‐active complexes [(p‐cymene)RuCl( L n )] and [Cp*RhCl( L n )] (Cp*=η5‐C5Me5) were prepared and characterized. For n=16 micelles are formed in water at concentrations as low as 0.6 mM , as demonstrated by surface‐tension measurements. The complexes were used for catalytic transfer hydrogenation of ketones with formate in water. Highly active catalyst systems were obtained in the case of complexes bearing C16 tails due to their ability to be adsorbed at the water/substrate interface. The scope of these catalyst systems in aqueous solutions was extended from partially water soluble aryl alkyl ketones (acetophenone, butyrophenone) to hydrophobic dialkyl ketones (2‐dodecanone). 相似文献
16.
新型离子液体介质中长链烯烃氢甲酰化反应 总被引:2,自引:0,他引:2
合成和表征了离子液体[Rmim][p-CH3C6H4SO3](R=CH3(CH2)n—, n=3, 7, 11, 15), 并以所合成的离子液体为反应介质, 考察了水溶性铑膦络合物HRh(CO)(TPPTS)3[TPPTS: P(m-C6H4SO3Na)3]对长链烯烃氢甲酰化反应的催化性能. 结果表明, 离子液体[Rmim][p-CH3C6H4SO3]中R基团链长的变化对催化活性具有重要的影响;而在相同离子液体中, 氢甲酰化反应活性随着烯烃链长的增加明显下降. 与文献报道中广泛使用的离子液体[Bmim]BF4、[Bmim]PF6相比, 该催化体系对长链烯烃氢甲酰化反应具有更好的活性和化学选择性, 在3.0 MPa, 100 ℃的条件下, 1-己烯氢甲酰化反应转化频率(TOF)高达2736 h-1. 反应完成后, 水溶性铑膦络合物能很好地溶解在离子液体中, 与有机物自动分层, 催化剂的循环使用易于实现. 相似文献
17.
18.
Dr. Nicholas Toupin Mackenzie K. Herroon Prof. Randolph P. Thummel Prof. Claudia Turro Prof. Izabela Podgorski Prof. Heather Gibson Prof. Jeremy J. Kodanko 《Chemistry (Weinheim an der Bergstrasse, Germany)》2022,28(24):e202104430
Tumor associated macrophages (TAMs) suppress the cancer immune response and are a key target for immunotherapy. The effects of ruthenium and rhodium complexes on TAMs have not been well characterized. To address this gap in the field, a panel of 22 dirhodium and ruthenium complexes were screened against three subtypes of macrophages, triple-negative breast cancer and normal breast tissue cells. Experiments were carried out in 2D and biomimetic 3D co-culture experiments with and without irradiation with blue light. Leads were identified with cell-type-specific toxicity toward macrophage subtypes, cancer cells, or both. Experiments with 3D spheroids revealed complexes that sensitized the tumor models to the chemotherapeutic doxorubicin. Cell surface exposure of calreticulin, a known facilitator of immunogenic cell death (ICD), was increased upon treatment, along with a concomitant reduction in the M2-subtype classifier arginase. Our findings lay a strong foundation for the future development of ruthenium- and rhodium-based chemotherapies targeting TAMs. 相似文献