Noncovalent Anchoring of Asymmetric Hydrogenation Catalysts on a New Mesoporous Aluminosilicate: Application and Solvent Effects

This third edition retains the general level and scope of earlier editions, but has been substantially updated with over 900 new references covering the literature through 2005, and 140 more pages of text than the previous edition. In addition to the general updating of materials, there is new or greatly expanded coverage of topics such as Curtin-Hammett conditions, pressure effects, metal hydrides and asymmetric hydrogenation catalysts, the inverted electron-transfer region, intervalence electron transfer, photochemistry of metal carbonyls, methyl transferase and nitric oxide synthase. The new chapter on heterogeneous systems introduces the basic background to this industrially important area. The emphasis is on inorganic examples of gas/liquid and gas/liquid/solid systems and methods of determining heterogeneity.

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Recycling Asymmetric Hydrogenation Catalysts by Their Immobilization onto Ion-Exchange Resins

ChemInform ◽

10.1002/chin.200643233 ◽

2006 ◽

Vol 37 (43) ◽

Author(s):

Pierluigi Barbaro

Keyword(s):

Ion Exchange ◽

Asymmetric Hydrogenation ◽

Ion Exchange Resins ◽

Hydrogenation Catalysts ◽

Exchange Resins

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Synthesis of Iron P-N-P′ and P-NH-P′ Asymmetric Hydrogenation Catalysts

Organometallics ◽

10.1021/om5008083 ◽

2014 ◽

Vol 33 (22) ◽

pp. 6452-6465 ◽

Cited By ~ 49

Author(s):

Jessica F. Sonnenberg ◽

Alan J. Lough ◽

Robert H. Morris

Keyword(s):

Asymmetric Hydrogenation ◽

Hydrogenation Catalysts

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Correction to Synthesis of Iron P-N-P′ and P-NH-P′ Asymmetric Hydrogenation Catalysts

Organometallics ◽

10.1021/acs.organomet.6b00621 ◽

2016 ◽

Vol 35 (16) ◽

pp. 2772-2772 ◽

Cited By ~ 5

Author(s):

Jessica F. Sonnenberg ◽

Paraskevi O. Lagaditis ◽

Alan J. Lough ◽

Robert H. Morris

Keyword(s):

Asymmetric Hydrogenation ◽

Hydrogenation Catalysts

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Synthesis and Catalytic Applications of Novel Mesoporous Aluminosilicate Molecular Sieves

MRS Proceedings ◽

10.1557/proc-454-125 ◽

1996 ◽

Vol 454 ◽

Cited By ~ 8

Author(s):

Kondam Madhusudan Reddy ◽

Chunshan Song

Keyword(s):

Molecular Sieves ◽

Supported Catalysts ◽

Metal Sulfide ◽

Sodium Aluminate ◽

Mesoporous Molecular Sieve ◽

Mesoporous Molecular Sieves ◽

Hydrogenation Catalysts ◽

Mesoporous Aluminosilicate ◽

Catalytic Applications ◽

Mcm 41

ABSTRACTThis paper reports on the synthesis of four series of mesoporous aluminosilicate molecular sieves (Al-MCM-41) and their catalytic applications. Four different aluminum compounds were examined as Al source in the hydrothermal synthesis of the mesoporous aluminosilicates of MCM-41 type, including pseudo boehmite (alumina), aluminum sulfate, aluminum isopropoxide, and sodium aluminate. Each Al source was examined at three different feed Si/Al ratios in the synthesis. XRD results show that there are differences in the dioo-spacings for the samples prepared with different Al sources: sodium aluminate > Al isopropoxide > Al sulfate > pseudo boehmite. Such differences reveal that Al incorporation in the framework increases in the following order: pseudo boehmite < Al sulfate < Al isopropoxide < sodium aluminate. XRD also indicates that the synthesized Al-MCM-41 samples have different crystallinity. 27Al NMR and 29Si NMR reveal that most of the Al species in the samples prepared with pseudo boehmite were present in octahedral coordination, whereas in other samples nearly all the Al species are tetrahedral (in the framework). The acid characteristics of the synthesized molecular sieves were characterized by temperature-programmed desorption of n-butylamine, and by using 1,3,5-triisopropylbenzene hydrocracking as probe reaction. The results of TPD and probe reaction clearly indicate that the Al source used for synthesis has a major impact on the acidic and catalytic properties of Al-MCM-41. The samples prepared with Al isopropoxide and sodium aluminate are better as catalysts than those with Al sulfate and pseudo boehmite. We also explored the potential of mesoporous molecular sieves as support for noble metal hydrogenation catalysts and metal sulfide-based hydrotreating catalysts. Pd and Pt-loaded mesoporous molecular sieves were prepared and applied for hydrogenation of naphthalene and phenanthrene. The results show that mesoporous molecular sieve-supported catalysts are much more active than alumina- and titania-supported catalysts. The data for dibenzothiophene hydrodesulfurization suggest that Al-MCM-41 supported Co-Mo may be effective for deep desulfurization of distillate fuels.

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Asymmetric Synthesis of Chiral δ-lactones using BINAP-ruthenium(II) Complexes Hydrogenation Catalysts

Journal of Chemical Research ◽

10.3184/030823402103170790 ◽

2002 ◽

Vol 2002 (11) ◽

pp. 567-569 ◽

Cited By ~ 3

Author(s):

Yanjun Li ◽

Taeko Izumi

Keyword(s):

Asymmetric Synthesis ◽

Ruthenium Complexes ◽

Asymmetric Hydrogenation ◽

Optical Purity ◽

Hydrogenation Catalysts ◽

Keto Acids ◽

Chiralcel Od ◽

High Yields

Asymmetric hydrogenation of keto-acids was accomplished by catalytic amounts of BINAP-ruthenium complexes to afford the corresponding δ-lactones in high yields. The optical purity of the synthesised δ-lactones was determined by chiralcel (OD) in the 9–56% range.

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