Convenient and improved protocols for the hydrogenation of esters using Ru catalysts derived from (P,P), (P,N,N) and (P,N,O) ligands
作者:Ian Carpenter、Susan C. Eckelmann、Michael T. Kuntz、José A. Fuentes、Marcia B. France、Matthew L. Clarke
DOI:10.1039/c2dt30973d
日期:——
pre-cursor, [Ru(Cl)2(NBD)(Py)2], is treated with ligands to form [RuCl2(bidentateligand)(diamine)] pre-catalysts for esterhydrogenation is reported. This family of catalysts, as well as a range of ruthenium complexes of tridentate P^N^X (X = NR2, OH) ligands have been investigated in the hydrogenation of aromaticesters. A range of aromaticesters can be hydrogenated in high yields at temperatures
报道了一种改进的方案,其中用配体处理前体[Ru(Cl)2(NBD)(Py)2 ]以形成用于酯加氢的[RuCl 2(二齿配体)(二胺)]预催化剂。在芳族酯的氢化中,已经研究了该催化剂家族以及三齿P ^ N ^ X(X = NR 2,OH)配体的钌配合物。一系列芳族酯可以在30°C至100°C的温度下高产率氢化。
Use of molecular weight-enlarged catalysts in a process for asymmetric, continous hydrogenation, novel molecular weight-enlarged ligands and catalysts
申请人:Degussa-Huels Aktiengesellschaft
公开号:US20020016513A1
公开(公告)日:2002-02-07
The first embodiment of the present invention provides a process, which includes:
in a continuous process in a membrane reactor, asymmetrically hydrogenating at least one C=C, C=N or C=O double bond with a catalyst. Another embodiment of the present invention provides a ligand, which includes at least one di-1,3-aminophosphine homochiral active center; optionally, a linker; and a molecular weight-enlarging polymer; wherein the active center is bound to the molecular weight-enlarging polymer through the linker or is bound directly to the molecular weight-enlarging polymer; and wherein the linker is defined in the claims. Another embodiment of the present invention provides a process for preparing the above-noted ligand, and a catalyst that includes the above-noted ligand.
Indium-Catalyzed CO<sub>2</sub>/Epoxide Copolymerization: Enhancing Reactivity with a Hemilabile Phosphine Donor
作者:Hassan A. Baalbaki、Kudzanai Nyamayaro、Julia Shu、Chatura Goonesinghe、Hyuk-Joon Jung、Parisa Mehrkhodavandi
DOI:10.1021/acs.inorgchem.1c03123
日期:2021.12.20
Group 13 metal complexes have emerged as powerful catalysts for transforming CO2 into added-value products. However, direct comparisons of reactivity between Al, Ga, and In catalysts are rare. We report aluminum (1), gallium (2), and indium (3) complexes supported by a half-salen H[PNNO] ligand with a pendent phosphine donor and investigate their activity as catalysts for the copolymerization of CO2 and
第 13 族金属络合物已成为将 CO 2转化为附加值产品的强大催化剂。然而,很少直接比较 Al、Ga 和 In 催化剂之间的反应性。我们报告了铝 ( 1 ) 、镓 ( 2 ) 和铟 ( 3 ) 配合物,由半salen H[PNNO] 配体和磷化氢供体支撑,并研究它们作为 CO 2共聚催化剂的活性和环己烯氧化物。在溶液中,Al 和 Ga 配合物的 P 供体解离,而 In 配合物则表现出半稳定性。铟配合物显示出比 Al 或 Ga 类似物更高的转化率和选择性。通过NMR和FTIR光谱实验以及非循环催化中间体三氯化铟配合物[(PNNO)InCl 3 ][TBA]的结构表征研究了反应机理( 4 )。该研究强调了半稳定性膦基团对第 13 族金属的影响,并详细分析了 CO 2 /环氧化物共聚反应中的引发步骤。
Hydrogenation of Aldehydes, Esters, Imines, and Ketones Catalyzed by a Ruthenium Complex of a Chiral Tridentate Ligand
作者:Matthew L. Clarke、M. Belén Díaz-Valenzuela、Alexandra M. Z. Slawin
DOI:10.1021/om060673b
日期:2007.1.1
A novel rutheniumcomplex prepared from a chiral tridentate amine functionalized phosphine has been characterized by X-ray crystallography and been found to be active in the hydrogenation of an unprecedented range of CO and CN double bonds, including the enantioselectivehydrogenation and transferhydrogenation of normally unreactive bulky ketones with up to 90% ee.
Verwendung von molekulargewichtsvergrösserten Katalysatoren in einem Verfahren zur Asymmetrischen kontinuerlichen Hydrierung, neue molekulargewichtsvergrösserte Liganden und Katalysatoren
申请人:Degussa AG
公开号:EP1120162A2
公开(公告)日:2001-08-01
Die vorliegende Erfindung richtet sich auf eine Verwendung von molekulargewichtsvergrößerter homogen löslicher Katalysatoren Verfahren zur asymmetrischen kontinuierlichen Hydrierung von C=C-, C=N- oder C=O-Doppelbindungen mittels molekulargewichtsvergrößerter homogen löslicher Katalysatoren in einem Membranreaktor.
Bisherige im Stand der Technik vorgeschlagene Hydrierverfahren liefen diskontinuierlich ab. Die kontinuierliche Fahrweise hilft dagegen Prozeßkosten zu sparen.
Angegeben werden auch neue molekulargewichtsvergrößerte Liganden und Katalysatoren.